./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs --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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:06,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:06,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:06,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:06,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:06,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:06,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:06,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:06,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:06,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:06,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:06,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:06,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:06,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:06,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:06,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:06,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:06,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:06,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:06,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:06,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:06,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:06,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:06,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:06,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:06,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:06,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:06,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:06,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:06,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:06,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:06,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:06,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:06,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:06,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:06,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:06,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:06,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:06,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:06,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:06,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:06,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:50:06,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:06,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:06,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:06,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:06,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:06,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:06,714 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:06,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:50:06,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:06,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:06,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:50:06,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:50:06,717 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:06,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:50:06,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:50:06,717 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:50:06,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:06,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:06,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:50:06,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:06,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:06,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:06,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:06,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:06,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:06,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:06,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:06,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:06,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:06,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:06,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:06,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:06,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:06,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:06,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:06,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:50:06,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:50:06,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:06,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:06,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:06,726 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_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2021-11-19 14:50:07,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:07,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:07,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:07,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:07,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:07,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-19 14:50:07,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/f947ec99c/2232260a0a504cb0820df9a260400c69/FLAG656caba7b [2021-11-19 14:50:07,765 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:07,766 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-19 14:50:07,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/f947ec99c/2232260a0a504cb0820df9a260400c69/FLAG656caba7b [2021-11-19 14:50:07,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/f947ec99c/2232260a0a504cb0820df9a260400c69 [2021-11-19 14:50:07,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:08,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:08,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:08,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:08,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:08,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:07" (1/1) ... [2021-11-19 14:50:08,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dab16b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:08, skipping insertion in model container [2021-11-19 14:50:08,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:07" (1/1) ... [2021-11-19 14:50:08,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:08,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:08,362 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-19 14:50:08,739 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:08,767 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:50:08,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a281e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:08, skipping insertion in model container [2021-11-19 14:50:08,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:08,769 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:50:08,771 INFO L158 Benchmark]: Toolchain (without parser) took 768.72ms. Allocated memory is still 121.6MB. Free memory was 75.4MB in the beginning and 79.1MB in the end (delta: -3.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-19 14:50:08,773 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:50:08,774 INFO L158 Benchmark]: CACSL2BoogieTranslator took 765.67ms. Allocated memory is still 121.6MB. Free memory was 75.2MB in the beginning and 79.1MB in the end (delta: -4.0MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2021-11-19 14:50:08,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 765.67ms. Allocated memory is still 121.6MB. Free memory was 75.2MB in the beginning and 79.1MB in the end (delta: -4.0MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2473]: 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_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs --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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:50:11,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:50:11,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:50:11,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:50:11,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:50:11,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:50:11,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:50:11,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:50:11,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:50:11,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:50:11,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:50:11,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:50:11,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:50:11,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:50:11,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:50:11,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:50:11,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:50:11,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:50:11,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:50:11,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:50:11,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:50:11,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:50:11,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:50:11,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:50:11,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:50:11,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:50:11,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:50:11,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:50:11,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:50:11,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:50:11,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:50:11,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:50:11,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:50:11,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:50:11,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:50:11,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:50:11,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:50:11,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:50:11,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:50:11,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:50:11,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:50:11,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:50:11,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:50:11,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:50:11,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:50:11,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:50:11,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:50:11,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:50:11,470 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:50:11,470 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:50:11,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:50:11,471 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:50:11,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:50:11,473 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:50:11,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:50:11,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:50:11,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:50:11,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:50:11,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:50:11,475 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:50:11,475 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:50:11,475 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:50:11,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:50:11,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:50:11,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:50:11,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:50:11,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:50:11,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:50:11,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:50:11,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:11,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:50:11,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:50:11,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:50:11,478 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:50:11,478 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:50:11,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:50:11,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:50:11,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:50:11,480 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_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2021-11-19 14:50:11,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:50:11,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:50:11,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:50:11,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:50:11,969 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:50:11,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-19 14:50:12,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/bef9c7ac7/724e4cd869294a00aa5d5f52c2bc76d7/FLAG05661cc74 [2021-11-19 14:50:12,889 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:50:12,892 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2021-11-19 14:50:12,917 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/bef9c7ac7/724e4cd869294a00aa5d5f52c2bc76d7/FLAG05661cc74 [2021-11-19 14:50:13,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/data/bef9c7ac7/724e4cd869294a00aa5d5f52c2bc76d7 [2021-11-19 14:50:13,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:50:13,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:50:13,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:13,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:50:13,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:50:13,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:13" (1/1) ... [2021-11-19 14:50:13,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7907f791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:13, skipping insertion in model container [2021-11-19 14:50:13,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:13" (1/1) ... [2021-11-19 14:50:13,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:50:13,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:13,341 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-19 14:50:13,825 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:13,844 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:50:13,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:50:13,885 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-19 14:50:14,028 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:14,038 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:50:14,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2021-11-19 14:50:14,163 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:50:14,201 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:50:14,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14 WrapperNode [2021-11-19 14:50:14,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:50:14,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:14,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:50:14,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:50:14,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,384 INFO L137 Inliner]: procedures = 101, calls = 356, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 912 [2021-11-19 14:50:14,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:50:14,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:50:14,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:50:14,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:50:14,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:50:14,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:50:14,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:50:14,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:50:14,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (1/1) ... [2021-11-19 14:50:14,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:50:14,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:50:14,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:50:14,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:50:14,613 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:50:14,614 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:50:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:50:14,614 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:50:14,614 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:50:14,614 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:50:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:50:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-19 14:50:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:50:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:50:14,615 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:50:14,615 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:50:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:50:14,616 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:50:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:50:14,616 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:50:14,616 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:50:14,617 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:50:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:50:14,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:50:14,617 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:50:14,617 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:50:14,618 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:50:14,618 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:50:14,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:50:14,618 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:50:14,618 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:50:14,618 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:50:14,619 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:50:14,619 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:50:14,619 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:50:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:50:14,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:50:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:50:14,621 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:50:14,621 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:50:14,621 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:50:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:50:14,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:50:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:50:14,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:50:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:50:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:50:14,623 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:50:14,623 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:50:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:50:14,624 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:50:14,624 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:50:14,625 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:50:14,626 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:50:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:50:14,627 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:50:14,627 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:50:14,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:50:14,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:50:14,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:50:14,628 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:50:14,628 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:50:14,629 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:50:14,629 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:50:14,877 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:50:14,880 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:50:16,374 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:50:16,401 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:50:16,402 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:50:16,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:16 BoogieIcfgContainer [2021-11-19 14:50:16,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:50:16,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:50:16,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:50:16,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:50:16,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:50:13" (1/3) ... [2021-11-19 14:50:16,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f2b61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:16, skipping insertion in model container [2021-11-19 14:50:16,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:14" (2/3) ... [2021-11-19 14:50:16,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f2b61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:50:16, skipping insertion in model container [2021-11-19 14:50:16,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:16" (3/3) ... [2021-11-19 14:50:16,417 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2021-11-19 14:50:16,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:50:16,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:50:16,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:50:16,522 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 [2021-11-19 14:50:16,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:50:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 612 states, 474 states have (on average 1.6729957805907174) internal successors, (793), 497 states have internal predecessors, (793), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-19 14:50:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:50:16,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:16,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:16,595 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:16,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1600471716, now seen corresponding path program 1 times [2021-11-19 14:50:16,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:16,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088198983] [2021-11-19 14:50:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:16,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:16,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:16,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:50:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:50:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:50:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:50:17,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:17,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088198983] [2021-11-19 14:50:17,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088198983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:17,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:17,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:50:17,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100030824] [2021-11-19 14:50:17,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:17,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:50:17,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:17,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:50:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:17,722 INFO L87 Difference]: Start difference. First operand has 612 states, 474 states have (on average 1.6729957805907174) internal successors, (793), 497 states have internal predecessors, (793), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:50:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:17,819 INFO L93 Difference]: Finished difference Result 633 states and 1039 transitions. [2021-11-19 14:50:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:50:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-19 14:50:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:17,877 INFO L225 Difference]: With dead ends: 633 [2021-11-19 14:50:17,877 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:50:17,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:50:17,886 INFO L933 BasicCegarLoop]: 1000 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:17,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:50:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-19 14:50:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.670940170940171) internal successors, (782), 489 states have internal predecessors, (782), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 993 transitions. [2021-11-19 14:50:17,996 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 993 transitions. Word has length 83 [2021-11-19 14:50:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:17,998 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 993 transitions. [2021-11-19 14:50:17,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:50:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 993 transitions. [2021-11-19 14:50:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:50:18,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:18,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:18,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:18,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:18,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash -204438056, now seen corresponding path program 1 times [2021-11-19 14:50:18,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:18,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407044314] [2021-11-19 14:50:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:18,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:18,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:18,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:18,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:50:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:19,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:19,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:19,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407044314] [2021-11-19 14:50:19,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407044314] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:19,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:19,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:19,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956090315] [2021-11-19 14:50:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:19,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:19,312 INFO L87 Difference]: Start difference. First operand 604 states and 993 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:19,446 INFO L93 Difference]: Finished difference Result 1199 states and 1978 transitions. [2021-11-19 14:50:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-19 14:50:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:19,455 INFO L225 Difference]: With dead ends: 1199 [2021-11-19 14:50:19,456 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:50:19,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:19,472 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 14 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:19,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2930 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:50:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-19 14:50:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.6688034188034189) internal successors, (781), 489 states have internal predecessors, (781), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 992 transitions. [2021-11-19 14:50:19,531 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 992 transitions. Word has length 85 [2021-11-19 14:50:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:19,531 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 992 transitions. [2021-11-19 14:50:19,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 992 transitions. [2021-11-19 14:50:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:50:19,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:19,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:19,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:19,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:19,737 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1863267408, now seen corresponding path program 1 times [2021-11-19 14:50:19,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:19,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474118456] [2021-11-19 14:50:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:19,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:19,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:19,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:50:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:20,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:20,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:20,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474118456] [2021-11-19 14:50:20,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474118456] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:20,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:20,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:20,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721064792] [2021-11-19 14:50:20,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:20,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:20,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:20,696 INFO L87 Difference]: Start difference. First operand 604 states and 992 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:20,832 INFO L93 Difference]: Finished difference Result 1199 states and 1976 transitions. [2021-11-19 14:50:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:20,833 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-19 14:50:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:20,842 INFO L225 Difference]: With dead ends: 1199 [2021-11-19 14:50:20,842 INFO L226 Difference]: Without dead ends: 604 [2021-11-19 14:50:20,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:20,848 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 12 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:20,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2930 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-19 14:50:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-11-19 14:50:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 468 states have (on average 1.6666666666666667) internal successors, (780), 489 states have internal predecessors, (780), 108 states have call successors, (108), 28 states have call predecessors, (108), 27 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 991 transitions. [2021-11-19 14:50:20,891 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 991 transitions. Word has length 87 [2021-11-19 14:50:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:20,892 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 991 transitions. [2021-11-19 14:50:20,892 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 991 transitions. [2021-11-19 14:50:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:50:20,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:20,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:20,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:21,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:21,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 572926040, now seen corresponding path program 1 times [2021-11-19 14:50:21,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:21,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726040891] [2021-11-19 14:50:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:21,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:21,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:21,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:50:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:21,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:22,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:22,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726040891] [2021-11-19 14:50:22,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726040891] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:22,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:22,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:22,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559046070] [2021-11-19 14:50:22,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:22,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:22,086 INFO L87 Difference]: Start difference. First operand 604 states and 991 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:22,175 INFO L93 Difference]: Finished difference Result 1203 states and 1979 transitions. [2021-11-19 14:50:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-19 14:50:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:22,183 INFO L225 Difference]: With dead ends: 1203 [2021-11-19 14:50:22,183 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 14:50:22,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:22,189 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 13 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:22,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2930 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 14:50:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-19 14:50:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.6596194503171247) internal successors, (785), 494 states have internal predecessors, (785), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 996 transitions. [2021-11-19 14:50:22,228 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 996 transitions. Word has length 89 [2021-11-19 14:50:22,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:22,228 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 996 transitions. [2021-11-19 14:50:22,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 996 transitions. [2021-11-19 14:50:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 14:50:22,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:22,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:22,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:22,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:22,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash 483938580, now seen corresponding path program 1 times [2021-11-19 14:50:22,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:22,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454906023] [2021-11-19 14:50:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:22,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:22,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:22,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:50:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:23,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:23,358 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:23,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454906023] [2021-11-19 14:50:23,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454906023] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:23,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:23,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:23,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896500238] [2021-11-19 14:50:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:23,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:23,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:23,364 INFO L87 Difference]: Start difference. First operand 610 states and 996 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:23,447 INFO L93 Difference]: Finished difference Result 1202 states and 1970 transitions. [2021-11-19 14:50:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:23,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-19 14:50:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:23,455 INFO L225 Difference]: With dead ends: 1202 [2021-11-19 14:50:23,455 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 14:50:23,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:23,461 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 8 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:23,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2931 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 14:50:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-19 14:50:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.657505285412262) internal successors, (784), 494 states have internal predecessors, (784), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 995 transitions. [2021-11-19 14:50:23,495 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 995 transitions. Word has length 90 [2021-11-19 14:50:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:23,496 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 995 transitions. [2021-11-19 14:50:23,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 995 transitions. [2021-11-19 14:50:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:50:23,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:23,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:23,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:23,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:23,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:23,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1193536220, now seen corresponding path program 1 times [2021-11-19 14:50:23,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:23,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089051380] [2021-11-19 14:50:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:23,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:23,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:23,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:23,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:50:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:24,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:24,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:24,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089051380] [2021-11-19 14:50:24,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089051380] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:24,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:24,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:24,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439650973] [2021-11-19 14:50:24,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:24,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:24,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:24,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:24,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:24,718 INFO L87 Difference]: Start difference. First operand 610 states and 995 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:24,798 INFO L93 Difference]: Finished difference Result 1202 states and 1969 transitions. [2021-11-19 14:50:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-19 14:50:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:24,806 INFO L225 Difference]: With dead ends: 1202 [2021-11-19 14:50:24,806 INFO L226 Difference]: Without dead ends: 610 [2021-11-19 14:50:24,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:24,811 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 6 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:24,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2931 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-19 14:50:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-19 14:50:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 473 states have (on average 1.6553911205073997) internal successors, (783), 494 states have internal predecessors, (783), 108 states have call successors, (108), 29 states have call predecessors, (108), 28 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 994 transitions. [2021-11-19 14:50:24,845 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 994 transitions. Word has length 91 [2021-11-19 14:50:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:24,845 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 994 transitions. [2021-11-19 14:50:24,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 994 transitions. [2021-11-19 14:50:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:50:24,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:24,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:24,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:25,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:25,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash 889468184, now seen corresponding path program 1 times [2021-11-19 14:50:25,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:25,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995071618] [2021-11-19 14:50:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:25,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:25,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:25,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:50:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:25,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:26,157 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:26,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995071618] [2021-11-19 14:50:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995071618] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:26,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:26,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:50:26,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887466194] [2021-11-19 14:50:26,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:26,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:26,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:26,160 INFO L87 Difference]: Start difference. First operand 610 states and 994 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:26,410 INFO L93 Difference]: Finished difference Result 1219 states and 1997 transitions. [2021-11-19 14:50:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:26,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-19 14:50:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:26,420 INFO L225 Difference]: With dead ends: 1219 [2021-11-19 14:50:26,420 INFO L226 Difference]: Without dead ends: 631 [2021-11-19 14:50:26,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:26,426 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 148 mSDsluCounter, 4783 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:26,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5761 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-19 14:50:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-19 14:50:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 489 states have (on average 1.6543967280163598) internal successors, (809), 512 states have internal predecessors, (809), 109 states have call successors, (109), 29 states have call predecessors, (109), 30 states have return successors, (107), 101 states have call predecessors, (107), 104 states have call successors, (107) [2021-11-19 14:50:26,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1025 transitions. [2021-11-19 14:50:26,462 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1025 transitions. Word has length 92 [2021-11-19 14:50:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:26,462 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1025 transitions. [2021-11-19 14:50:26,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1025 transitions. [2021-11-19 14:50:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:50:26,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:26,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:26,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:26,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:26,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:26,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1756520409, now seen corresponding path program 1 times [2021-11-19 14:50:26,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:26,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123241205] [2021-11-19 14:50:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:26,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:26,682 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:26,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:50:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:50:27,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:50:27,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:27,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123241205] [2021-11-19 14:50:27,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123241205] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:27,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:27,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:50:27,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976988341] [2021-11-19 14:50:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:27,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:50:27,543 INFO L87 Difference]: Start difference. First operand 629 states and 1025 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:27,631 INFO L93 Difference]: Finished difference Result 1232 states and 2019 transitions. [2021-11-19 14:50:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:27,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-19 14:50:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:27,639 INFO L225 Difference]: With dead ends: 1232 [2021-11-19 14:50:27,639 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 14:50:27,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:27,644 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 8 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:27,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2930 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:50:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 14:50:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-19 14:50:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6550308008213552) internal successors, (806), 509 states have internal predecessors, (806), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-19 14:50:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1018 transitions. [2021-11-19 14:50:27,676 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1018 transitions. Word has length 92 [2021-11-19 14:50:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:27,677 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1018 transitions. [2021-11-19 14:50:27,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1018 transitions. [2021-11-19 14:50:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:50:27,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:27,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:27,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:27,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:27,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash 162738395, now seen corresponding path program 1 times [2021-11-19 14:50:27,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:27,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805308726] [2021-11-19 14:50:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:27,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:27,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:50:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:28,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:28,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:28,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805308726] [2021-11-19 14:50:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805308726] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:28,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:28,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:28,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057136942] [2021-11-19 14:50:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:28,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:28,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:28,773 INFO L87 Difference]: Start difference. First operand 625 states and 1018 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:28,993 INFO L93 Difference]: Finished difference Result 1258 states and 2064 transitions. [2021-11-19 14:50:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-19 14:50:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:29,008 INFO L225 Difference]: With dead ends: 1258 [2021-11-19 14:50:29,008 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 14:50:29,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:29,015 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 134 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2738 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 14:50:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-19 14:50:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6447638603696098) internal successors, (801), 509 states have internal predecessors, (801), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-19 14:50:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1013 transitions. [2021-11-19 14:50:29,071 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1013 transitions. Word has length 93 [2021-11-19 14:50:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:29,072 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1013 transitions. [2021-11-19 14:50:29,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1013 transitions. [2021-11-19 14:50:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:50:29,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:29,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:29,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:29,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1005788359, now seen corresponding path program 1 times [2021-11-19 14:50:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:29,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276367651] [2021-11-19 14:50:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:29,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:29,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:29,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:50:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:29,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:30,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:30,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276367651] [2021-11-19 14:50:30,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276367651] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:30,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:30,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:30,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392014512] [2021-11-19 14:50:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:30,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:30,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:30,186 INFO L87 Difference]: Start difference. First operand 625 states and 1013 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:30,402 INFO L93 Difference]: Finished difference Result 1258 states and 2054 transitions. [2021-11-19 14:50:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-19 14:50:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:30,410 INFO L225 Difference]: With dead ends: 1258 [2021-11-19 14:50:30,411 INFO L226 Difference]: Without dead ends: 625 [2021-11-19 14:50:30,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:30,416 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 128 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:30,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2738 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-11-19 14:50:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2021-11-19 14:50:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 487 states have (on average 1.6344969199178645) internal successors, (796), 509 states have internal predecessors, (796), 108 states have call successors, (108), 29 states have call predecessors, (108), 29 states have return successors, (104), 100 states have call predecessors, (104), 103 states have call successors, (104) [2021-11-19 14:50:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1008 transitions. [2021-11-19 14:50:30,444 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1008 transitions. Word has length 95 [2021-11-19 14:50:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:30,445 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1008 transitions. [2021-11-19 14:50:30,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:30,445 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1008 transitions. [2021-11-19 14:50:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:50:30,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:30,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:30,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:30,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:30,668 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash 813779643, now seen corresponding path program 1 times [2021-11-19 14:50:30,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:30,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954678124] [2021-11-19 14:50:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:30,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:30,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:30,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:50:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:31,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:31,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:31,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:31,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954678124] [2021-11-19 14:50:31,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954678124] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:31,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:31,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101134902] [2021-11-19 14:50:31,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:31,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:31,576 INFO L87 Difference]: Start difference. First operand 625 states and 1008 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:31,788 INFO L93 Difference]: Finished difference Result 1279 states and 2075 transitions. [2021-11-19 14:50:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:50:31,790 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-19 14:50:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:31,797 INFO L225 Difference]: With dead ends: 1279 [2021-11-19 14:50:31,797 INFO L226 Difference]: Without dead ends: 655 [2021-11-19 14:50:31,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:31,802 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 143 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:31,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2748 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-19 14:50:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 640. [2021-11-19 14:50:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 502 states have (on average 1.6155378486055776) internal successors, (811), 523 states have internal predecessors, (811), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1022 transitions. [2021-11-19 14:50:31,832 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1022 transitions. Word has length 97 [2021-11-19 14:50:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:31,833 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1022 transitions. [2021-11-19 14:50:31,833 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1022 transitions. [2021-11-19 14:50:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:50:31,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:31,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:31,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:32,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:32,050 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash 689905211, now seen corresponding path program 1 times [2021-11-19 14:50:32,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:32,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966658544] [2021-11-19 14:50:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:32,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:32,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:32,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:50:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:32,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:33,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:33,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966658544] [2021-11-19 14:50:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966658544] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:33,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:33,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:50:33,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868890170] [2021-11-19 14:50:33,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:33,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:50:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:50:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:33,055 INFO L87 Difference]: Start difference. First operand 640 states and 1022 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:33,240 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-19 14:50:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-19 14:50:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:33,247 INFO L225 Difference]: With dead ends: 1243 [2021-11-19 14:50:33,248 INFO L226 Difference]: Without dead ends: 634 [2021-11-19 14:50:33,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:33,253 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 131 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5729 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:33,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5729 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-19 14:50:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 619. [2021-11-19 14:50:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.6091476091476091) internal successors, (774), 502 states have internal predecessors, (774), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 985 transitions. [2021-11-19 14:50:33,288 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 985 transitions. Word has length 97 [2021-11-19 14:50:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:33,289 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 985 transitions. [2021-11-19 14:50:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 985 transitions. [2021-11-19 14:50:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:50:33,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:33,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:33,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:33,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:33,517 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1248396917, now seen corresponding path program 1 times [2021-11-19 14:50:33,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:33,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031998780] [2021-11-19 14:50:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:33,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:33,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:33,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:50:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:34,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:34,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031998780] [2021-11-19 14:50:34,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031998780] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:34,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:34,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:34,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350211787] [2021-11-19 14:50:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:34,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:34,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:34,485 INFO L87 Difference]: Start difference. First operand 619 states and 985 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:34,660 INFO L93 Difference]: Finished difference Result 1207 states and 1934 transitions. [2021-11-19 14:50:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-19 14:50:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:34,668 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:50:34,669 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 14:50:34,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:34,675 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 69 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:34,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2762 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 14:50:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-19 14:50:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.607068607068607) internal successors, (773), 502 states have internal predecessors, (773), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 984 transitions. [2021-11-19 14:50:34,706 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 984 transitions. Word has length 98 [2021-11-19 14:50:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:34,707 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 984 transitions. [2021-11-19 14:50:34,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 984 transitions. [2021-11-19 14:50:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:50:34,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:34,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:34,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:34,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:34,933 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1982159594, now seen corresponding path program 1 times [2021-11-19 14:50:34,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:34,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016459616] [2021-11-19 14:50:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:34,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:34,935 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:50:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:35,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:50:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:35,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:50:35,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:35,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016459616] [2021-11-19 14:50:35,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016459616] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:35,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:35,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:50:35,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175636436] [2021-11-19 14:50:35,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:35,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:50:35,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:50:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:50:35,911 INFO L87 Difference]: Start difference. First operand 619 states and 984 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:36,057 INFO L93 Difference]: Finished difference Result 1207 states and 1933 transitions. [2021-11-19 14:50:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:50:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-19 14:50:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:36,064 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:50:36,065 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 14:50:36,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:50:36,070 INFO L933 BasicCegarLoop]: 950 mSDtfsCounter, 67 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2762 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:36,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2762 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 14:50:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2021-11-19 14:50:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 481 states have (on average 1.604989604989605) internal successors, (772), 502 states have internal predecessors, (772), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 983 transitions. [2021-11-19 14:50:36,107 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 983 transitions. Word has length 99 [2021-11-19 14:50:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:36,108 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 983 transitions. [2021-11-19 14:50:36,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:50:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 983 transitions. [2021-11-19 14:50:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 14:50:36,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:36,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:36,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:36,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:36,327 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1425980848, now seen corresponding path program 1 times [2021-11-19 14:50:36,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:36,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871125210] [2021-11-19 14:50:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:36,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:36,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:36,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:36,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:50:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:36,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:36,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:36,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:37,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:37,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871125210] [2021-11-19 14:50:37,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871125210] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:37,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:37,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:50:37,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231933871] [2021-11-19 14:50:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:37,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:37,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:37,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:37,491 INFO L87 Difference]: Start difference. First operand 619 states and 983 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:37,767 INFO L93 Difference]: Finished difference Result 1212 states and 1940 transitions. [2021-11-19 14:50:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-19 14:50:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:37,794 INFO L225 Difference]: With dead ends: 1212 [2021-11-19 14:50:37,794 INFO L226 Difference]: Without dead ends: 630 [2021-11-19 14:50:37,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:37,799 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 109 mSDsluCounter, 5486 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6411 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:37,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6411 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-19 14:50:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 621. [2021-11-19 14:50:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 483 states have (on average 1.6004140786749483) internal successors, (773), 504 states have internal predecessors, (773), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 984 transitions. [2021-11-19 14:50:37,830 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 984 transitions. Word has length 100 [2021-11-19 14:50:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:37,831 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 984 transitions. [2021-11-19 14:50:37,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 984 transitions. [2021-11-19 14:50:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:50:37,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:37,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:37,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:38,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:38,058 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2039444641, now seen corresponding path program 1 times [2021-11-19 14:50:38,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:38,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786190359] [2021-11-19 14:50:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:38,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:38,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:38,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:50:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:50:38,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:39,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:39,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786190359] [2021-11-19 14:50:39,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786190359] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:50:39,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:50:39,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:50:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781665383] [2021-11-19 14:50:39,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:39,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:39,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:39,235 INFO L87 Difference]: Start difference. First operand 621 states and 984 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:39,545 INFO L93 Difference]: Finished difference Result 1204 states and 1921 transitions. [2021-11-19 14:50:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-19 14:50:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:39,553 INFO L225 Difference]: With dead ends: 1204 [2021-11-19 14:50:39,554 INFO L226 Difference]: Without dead ends: 626 [2021-11-19 14:50:39,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:39,558 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 77 mSDsluCounter, 5492 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:39,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6419 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-11-19 14:50:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 623. [2021-11-19 14:50:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 485 states have (on average 1.595876288659794) internal successors, (774), 506 states have internal predecessors, (774), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 985 transitions. [2021-11-19 14:50:39,593 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 985 transitions. Word has length 101 [2021-11-19 14:50:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:39,593 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 985 transitions. [2021-11-19 14:50:39,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:50:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 985 transitions. [2021-11-19 14:50:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:50:39,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:39,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:39,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:39,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:39,820 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1698740326, now seen corresponding path program 1 times [2021-11-19 14:50:39,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:39,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009325666] [2021-11-19 14:50:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:39,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:39,822 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:39,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:50:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:40,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:40,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:40,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:41,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:41,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009325666] [2021-11-19 14:50:41,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009325666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:41,009 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:41,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:50:41,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253101440] [2021-11-19 14:50:41,009 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:41,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:50:41,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:50:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:41,012 INFO L87 Difference]: Start difference. First operand 623 states and 985 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:41,232 INFO L93 Difference]: Finished difference Result 1150 states and 1848 transitions. [2021-11-19 14:50:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:50:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-19 14:50:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:41,240 INFO L225 Difference]: With dead ends: 1150 [2021-11-19 14:50:41,240 INFO L226 Difference]: Without dead ends: 616 [2021-11-19 14:50:41,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:41,245 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 110 mSDsluCounter, 4678 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:41,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 5617 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-11-19 14:50:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2021-11-19 14:50:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 478 states have (on average 1.602510460251046) internal successors, (766), 499 states have internal predecessors, (766), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 977 transitions. [2021-11-19 14:50:41,281 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 977 transitions. Word has length 102 [2021-11-19 14:50:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:41,281 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 977 transitions. [2021-11-19 14:50:41,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 977 transitions. [2021-11-19 14:50:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:50:41,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:41,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:41,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:41,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:41,510 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -937103009, now seen corresponding path program 1 times [2021-11-19 14:50:41,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:41,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758415663] [2021-11-19 14:50:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:41,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:41,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:41,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:50:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:42,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:42,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:42,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758415663] [2021-11-19 14:50:42,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758415663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:42,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:42,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:50:42,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546368182] [2021-11-19 14:50:42,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:42,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:50:42,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:50:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:50:42,561 INFO L87 Difference]: Start difference. First operand 616 states and 977 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:42,744 INFO L93 Difference]: Finished difference Result 1155 states and 1862 transitions. [2021-11-19 14:50:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-19 14:50:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:42,752 INFO L225 Difference]: With dead ends: 1155 [2021-11-19 14:50:42,752 INFO L226 Difference]: Without dead ends: 613 [2021-11-19 14:50:42,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:50:42,757 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 98 mSDsluCounter, 5484 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:42,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6415 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-11-19 14:50:42,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2021-11-19 14:50:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 475 states have (on average 1.6021052631578947) internal successors, (761), 496 states have internal predecessors, (761), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 972 transitions. [2021-11-19 14:50:42,788 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 972 transitions. Word has length 103 [2021-11-19 14:50:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:42,788 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 972 transitions. [2021-11-19 14:50:42,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 972 transitions. [2021-11-19 14:50:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:50:42,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:42,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:42,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:43,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:43,015 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1114886689, now seen corresponding path program 1 times [2021-11-19 14:50:43,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:43,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793661209] [2021-11-19 14:50:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:43,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:43,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:43,018 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:50:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:43,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:43,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:44,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:44,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793661209] [2021-11-19 14:50:44,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793661209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:44,018 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:44,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:50:44,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883380768] [2021-11-19 14:50:44,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:44,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:50:44,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:50:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:50:44,024 INFO L87 Difference]: Start difference. First operand 613 states and 972 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:50:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:44,212 INFO L93 Difference]: Finished difference Result 1152 states and 1857 transitions. [2021-11-19 14:50:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:50:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-19 14:50:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:44,220 INFO L225 Difference]: With dead ends: 1152 [2021-11-19 14:50:44,220 INFO L226 Difference]: Without dead ends: 605 [2021-11-19 14:50:44,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:50:44,224 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 105 mSDsluCounter, 5475 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6405 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:44,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6405 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:50:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-19 14:50:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-19 14:50:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.6059957173447537) internal successors, (750), 488 states have internal predecessors, (750), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 961 transitions. [2021-11-19 14:50:44,291 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 961 transitions. Word has length 103 [2021-11-19 14:50:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:44,292 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 961 transitions. [2021-11-19 14:50:44,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:50:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 961 transitions. [2021-11-19 14:50:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:50:44,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:44,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:44,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:44,518 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:44,519 INFO L85 PathProgramCache]: Analyzing trace with hash 101702238, now seen corresponding path program 1 times [2021-11-19 14:50:44,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:44,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981348071] [2021-11-19 14:50:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:44,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:44,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:44,522 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:44,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:50:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:45,873 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:45,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981348071] [2021-11-19 14:50:45,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981348071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:45,874 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:45,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:45,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728800685] [2021-11-19 14:50:45,874 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:45,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:45,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:45,876 INFO L87 Difference]: Start difference. First operand 605 states and 961 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:46,159 INFO L93 Difference]: Finished difference Result 1138 states and 1835 transitions. [2021-11-19 14:50:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-19 14:50:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:46,167 INFO L225 Difference]: With dead ends: 1138 [2021-11-19 14:50:46,167 INFO L226 Difference]: Without dead ends: 605 [2021-11-19 14:50:46,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:50:46,171 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 101 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 8244 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:46,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 8244 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-19 14:50:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-11-19 14:50:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.6038543897216273) internal successors, (749), 488 states have internal predecessors, (749), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 960 transitions. [2021-11-19 14:50:46,199 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 960 transitions. Word has length 104 [2021-11-19 14:50:46,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:46,199 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 960 transitions. [2021-11-19 14:50:46,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 960 transitions. [2021-11-19 14:50:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:50:46,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:46,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:46,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:46,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:46,419 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2097914435, now seen corresponding path program 1 times [2021-11-19 14:50:46,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:46,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11158821] [2021-11-19 14:50:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:46,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:46,422 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:46,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:50:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:50:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:47,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:47,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:47,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11158821] [2021-11-19 14:50:47,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11158821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:47,683 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:47,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:47,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141188434] [2021-11-19 14:50:47,683 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:47,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:47,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:47,686 INFO L87 Difference]: Start difference. First operand 605 states and 960 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:47,961 INFO L93 Difference]: Finished difference Result 1182 states and 1892 transitions. [2021-11-19 14:50:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-19 14:50:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:47,970 INFO L225 Difference]: With dead ends: 1182 [2021-11-19 14:50:47,970 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 14:50:47,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:47,976 INFO L933 BasicCegarLoop]: 914 mSDtfsCounter, 144 mSDsluCounter, 5424 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6338 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:47,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6338 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 14:50:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-19 14:50:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 464 states have (on average 1.5969827586206897) internal successors, (741), 485 states have internal predecessors, (741), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 952 transitions. [2021-11-19 14:50:48,014 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 952 transitions. Word has length 105 [2021-11-19 14:50:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:48,014 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 952 transitions. [2021-11-19 14:50:48,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 952 transitions. [2021-11-19 14:50:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:50:48,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:48,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:48,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:48,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:48,231 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash 484929539, now seen corresponding path program 1 times [2021-11-19 14:50:48,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:48,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923959207] [2021-11-19 14:50:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:48,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:48,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:48,234 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:48,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:50:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:49,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:49,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923959207] [2021-11-19 14:50:49,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923959207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:49,522 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:49,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74259254] [2021-11-19 14:50:49,523 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:49,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:49,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:49,527 INFO L87 Difference]: Start difference. First operand 602 states and 952 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:49,835 INFO L93 Difference]: Finished difference Result 1129 states and 1815 transitions. [2021-11-19 14:50:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-19 14:50:49,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:49,842 INFO L225 Difference]: With dead ends: 1129 [2021-11-19 14:50:49,843 INFO L226 Difference]: Without dead ends: 602 [2021-11-19 14:50:49,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:50:49,848 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 100 mSDsluCounter, 5452 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6367 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:49,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6367 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-11-19 14:50:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 602. [2021-11-19 14:50:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 464 states have (on average 1.5948275862068966) internal successors, (740), 485 states have internal predecessors, (740), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 951 transitions. [2021-11-19 14:50:49,878 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 951 transitions. Word has length 106 [2021-11-19 14:50:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:49,879 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 951 transitions. [2021-11-19 14:50:49,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 951 transitions. [2021-11-19 14:50:49,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:50:49,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:49,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:49,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:50,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:50,099 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1905380946, now seen corresponding path program 1 times [2021-11-19 14:50:50,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:50,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159774964] [2021-11-19 14:50:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:50,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:50,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:50,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:50:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:50:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:50,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:50:51,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:51,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159774964] [2021-11-19 14:50:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159774964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:51,290 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:51,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:50:51,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897061000] [2021-11-19 14:50:51,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:50:51,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:50:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:50:51,292 INFO L87 Difference]: Start difference. First operand 602 states and 951 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:50:51,553 INFO L93 Difference]: Finished difference Result 1167 states and 1860 transitions. [2021-11-19 14:50:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:50:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-19 14:50:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:50:51,561 INFO L225 Difference]: With dead ends: 1167 [2021-11-19 14:50:51,562 INFO L226 Difference]: Without dead ends: 599 [2021-11-19 14:50:51,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:50:51,566 INFO L933 BasicCegarLoop]: 913 mSDtfsCounter, 76 mSDsluCounter, 8133 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 9046 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:50:51,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 9046 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:50:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-19 14:50:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-19 14:50:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 461 states have (on average 1.5878524945770065) internal successors, (732), 482 states have internal predecessors, (732), 108 states have call successors, (108), 30 states have call predecessors, (108), 29 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:50:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 943 transitions. [2021-11-19 14:50:51,600 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 943 transitions. Word has length 107 [2021-11-19 14:50:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:50:51,601 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 943 transitions. [2021-11-19 14:50:51,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:50:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 943 transitions. [2021-11-19 14:50:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:50:51,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:50:51,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:50:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:50:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:50:51,817 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:50:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:50:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 216038504, now seen corresponding path program 1 times [2021-11-19 14:50:51,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:50:51,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734547607] [2021-11-19 14:50:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:50:51,819 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:50:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:50:51,820 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:50:51,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:50:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:50:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:50:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:50:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:50:53,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:50:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:50:53,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:50:53,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734547607] [2021-11-19 14:50:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734547607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:50:53,731 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:50:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 14:50:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483416388] [2021-11-19 14:50:53,731 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:50:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:50:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:50:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:50:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:50:53,733 INFO L87 Difference]: Start difference. First operand 599 states and 943 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:51:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:04,339 INFO L93 Difference]: Finished difference Result 2875 states and 4726 transitions. [2021-11-19 14:51:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:51:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-19 14:51:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:04,363 INFO L225 Difference]: With dead ends: 2875 [2021-11-19 14:51:04,363 INFO L226 Difference]: Without dead ends: 2356 [2021-11-19 14:51:04,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:51:04,368 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6170 mSDsluCounter, 2283 mSDsCounter, 0 mSdLazyCounter, 5694 mSolverCounterSat, 1765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6367 SdHoareTripleChecker+Valid, 3909 SdHoareTripleChecker+Invalid, 7459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1765 IncrementalHoareTripleChecker+Valid, 5694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:04,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6367 Valid, 3909 Invalid, 7459 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1765 Valid, 5694 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 14:51:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-11-19 14:51:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2174. [2021-11-19 14:51:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 1659 states have (on average 1.6401446654611211) internal successors, (2721), 1724 states have internal predecessors, (2721), 422 states have call successors, (422), 89 states have call predecessors, (422), 92 states have return successors, (430), 387 states have call predecessors, (430), 417 states have call successors, (430) [2021-11-19 14:51:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 3573 transitions. [2021-11-19 14:51:04,564 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 3573 transitions. Word has length 108 [2021-11-19 14:51:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:04,564 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 3573 transitions. [2021-11-19 14:51:04,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:51:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 3573 transitions. [2021-11-19 14:51:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:51:04,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:04,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:04,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:04,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:04,799 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2122326494, now seen corresponding path program 1 times [2021-11-19 14:51:04,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:04,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864484543] [2021-11-19 14:51:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:04,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:04,803 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:51:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:05,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:05,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:06,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:06,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864484543] [2021-11-19 14:51:06,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864484543] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:06,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:06,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:06,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325320569] [2021-11-19 14:51:06,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:06,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:06,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:06,715 INFO L87 Difference]: Start difference. First operand 2174 states and 3573 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:07,899 INFO L93 Difference]: Finished difference Result 4284 states and 7191 transitions. [2021-11-19 14:51:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:07,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 163 [2021-11-19 14:51:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:07,924 INFO L225 Difference]: With dead ends: 4284 [2021-11-19 14:51:07,924 INFO L226 Difference]: Without dead ends: 2190 [2021-11-19 14:51:07,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:07,942 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 847 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2307 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:07,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2307 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:51:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-11-19 14:51:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 2190. [2021-11-19 14:51:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 1671 states have (on average 1.6355475763016158) internal successors, (2733), 1736 states have internal predecessors, (2733), 422 states have call successors, (422), 93 states have call predecessors, (422), 96 states have return successors, (434), 387 states have call predecessors, (434), 417 states have call successors, (434) [2021-11-19 14:51:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 3589 transitions. [2021-11-19 14:51:08,099 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 3589 transitions. Word has length 163 [2021-11-19 14:51:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:08,100 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 3589 transitions. [2021-11-19 14:51:08,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 3589 transitions. [2021-11-19 14:51:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:51:08,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:08,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:08,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:08,323 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1716344167, now seen corresponding path program 1 times [2021-11-19 14:51:08,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:08,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100344234] [2021-11-19 14:51:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:08,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:08,325 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:08,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:51:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:51:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:51:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:51:10,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100344234] [2021-11-19 14:51:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100344234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:10,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:51:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131463024] [2021-11-19 14:51:10,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:51:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:51:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:51:10,221 INFO L87 Difference]: Start difference. First operand 2190 states and 3589 transitions. Second operand has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:51:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:19,973 INFO L93 Difference]: Finished difference Result 5768 states and 9480 transitions. [2021-11-19 14:51:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 14:51:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) Word has length 164 [2021-11-19 14:51:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:20,001 INFO L225 Difference]: With dead ends: 5768 [2021-11-19 14:51:20,001 INFO L226 Difference]: Without dead ends: 3658 [2021-11-19 14:51:20,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:51:20,013 INFO L933 BasicCegarLoop]: 1889 mSDtfsCounter, 4220 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 7254 mSolverCounterSat, 1655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4313 SdHoareTripleChecker+Valid, 4963 SdHoareTripleChecker+Invalid, 8909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1655 IncrementalHoareTripleChecker+Valid, 7254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:20,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4313 Valid, 4963 Invalid, 8909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1655 Valid, 7254 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-19 14:51:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-11-19 14:51:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3192. [2021-11-19 14:51:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 2379 states have (on average 1.596469104665826) internal successors, (3798), 2470 states have internal predecessors, (3798), 660 states have call successors, (660), 136 states have call predecessors, (660), 152 states have return successors, (702), 618 states have call predecessors, (702), 655 states have call successors, (702) [2021-11-19 14:51:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 5160 transitions. [2021-11-19 14:51:20,266 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 5160 transitions. Word has length 164 [2021-11-19 14:51:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 3192 states and 5160 transitions. [2021-11-19 14:51:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.076923076923077) internal successors, (157), 11 states have internal predecessors, (157), 7 states have call successors, (28), 5 states have call predecessors, (28), 5 states have return successors, (27), 7 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-19 14:51:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 5160 transitions. [2021-11-19 14:51:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:51:20,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:20,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:20,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:20,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:20,491 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1707718100, now seen corresponding path program 1 times [2021-11-19 14:51:20,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:20,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685182729] [2021-11-19 14:51:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:20,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:20,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:20,494 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:20,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:51:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:21,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:22,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:22,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685182729] [2021-11-19 14:51:22,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685182729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:22,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:22,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:22,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767444788] [2021-11-19 14:51:22,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:22,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:22,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:22,143 INFO L87 Difference]: Start difference. First operand 3192 states and 5160 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:23,390 INFO L93 Difference]: Finished difference Result 6354 states and 10479 transitions. [2021-11-19 14:51:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 165 [2021-11-19 14:51:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:23,433 INFO L225 Difference]: With dead ends: 6354 [2021-11-19 14:51:23,437 INFO L226 Difference]: Without dead ends: 3242 [2021-11-19 14:51:23,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:23,456 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:23,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:51:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-11-19 14:51:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 3242. [2021-11-19 14:51:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3242 states, 2419 states have (on average 1.586606035551881) internal successors, (3838), 2510 states have internal predecessors, (3838), 660 states have call successors, (660), 146 states have call predecessors, (660), 162 states have return successors, (708), 618 states have call predecessors, (708), 655 states have call successors, (708) [2021-11-19 14:51:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3242 states to 3242 states and 5206 transitions. [2021-11-19 14:51:23,770 INFO L78 Accepts]: Start accepts. Automaton has 3242 states and 5206 transitions. Word has length 165 [2021-11-19 14:51:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:23,770 INFO L470 AbstractCegarLoop]: Abstraction has 3242 states and 5206 transitions. [2021-11-19 14:51:23,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:23,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3242 states and 5206 transitions. [2021-11-19 14:51:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:51:23,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:23,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:23,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:24,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:24,004 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 934682654, now seen corresponding path program 1 times [2021-11-19 14:51:24,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:24,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468057707] [2021-11-19 14:51:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:24,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:24,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:24,007 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:24,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:51:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:25,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:25,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:25,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468057707] [2021-11-19 14:51:25,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468057707] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:25,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:25,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:25,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847056281] [2021-11-19 14:51:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:25,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:25,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:25,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:25,772 INFO L87 Difference]: Start difference. First operand 3242 states and 5206 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:26,901 INFO L93 Difference]: Finished difference Result 6464 states and 10571 transitions. [2021-11-19 14:51:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 167 [2021-11-19 14:51:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:26,922 INFO L225 Difference]: With dead ends: 6464 [2021-11-19 14:51:26,922 INFO L226 Difference]: Without dead ends: 3302 [2021-11-19 14:51:26,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:26,937 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:26,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:51:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-11-19 14:51:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3302. [2021-11-19 14:51:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 2469 states have (on average 1.574726609963548) internal successors, (3888), 2560 states have internal predecessors, (3888), 660 states have call successors, (660), 156 states have call predecessors, (660), 172 states have return successors, (714), 618 states have call predecessors, (714), 655 states have call successors, (714) [2021-11-19 14:51:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 5262 transitions. [2021-11-19 14:51:27,148 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 5262 transitions. Word has length 167 [2021-11-19 14:51:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 3302 states and 5262 transitions. [2021-11-19 14:51:27,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 5262 transitions. [2021-11-19 14:51:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:51:27,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:27,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:27,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:27,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:27,375 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:27,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash -916400116, now seen corresponding path program 1 times [2021-11-19 14:51:27,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:27,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065289830] [2021-11-19 14:51:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:27,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:27,378 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:27,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:51:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:51:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:28,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:51:29,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:29,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065289830] [2021-11-19 14:51:29,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065289830] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:51:29,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:51:29,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:51:29,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949027185] [2021-11-19 14:51:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:29,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:51:29,100 INFO L87 Difference]: Start difference. First operand 3302 states and 5262 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:30,248 INFO L93 Difference]: Finished difference Result 6594 states and 10683 transitions. [2021-11-19 14:51:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:51:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2021-11-19 14:51:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:30,272 INFO L225 Difference]: With dead ends: 6594 [2021-11-19 14:51:30,273 INFO L226 Difference]: Without dead ends: 3372 [2021-11-19 14:51:30,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:30,291 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 848 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:30,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 2308 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:51:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-19 14:51:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3372. [2021-11-19 14:51:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2529 states have (on average 1.5610913404507711) internal successors, (3948), 2620 states have internal predecessors, (3948), 660 states have call successors, (660), 166 states have call predecessors, (660), 182 states have return successors, (720), 618 states have call predecessors, (720), 655 states have call successors, (720) [2021-11-19 14:51:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 5328 transitions. [2021-11-19 14:51:30,588 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 5328 transitions. Word has length 169 [2021-11-19 14:51:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:30,589 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 5328 transitions. [2021-11-19 14:51:30,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:51:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 5328 transitions. [2021-11-19 14:51:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:51:30,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:30,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:30,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:30,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:30,824 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1109789790, now seen corresponding path program 1 times [2021-11-19 14:51:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:30,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280849371] [2021-11-19 14:51:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:30,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:30,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:30,827 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:30,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:51:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:31,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:51:31,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:32,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:51:33,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:33,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280849371] [2021-11-19 14:51:33,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280849371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:33,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270465262] [2021-11-19 14:51:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:33,520 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:33,522 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:33,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:51:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:33,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:51:33,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:51:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:51:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270465262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:35,653 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:51:35,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:51:35,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725676277] [2021-11-19 14:51:35,654 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:35,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:51:35,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:35,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:51:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:51:35,656 INFO L87 Difference]: Start difference. First operand 3372 states and 5328 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:51:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:36,614 INFO L93 Difference]: Finished difference Result 6615 states and 10520 transitions. [2021-11-19 14:51:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:51:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 171 [2021-11-19 14:51:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:36,636 INFO L225 Difference]: With dead ends: 6615 [2021-11-19 14:51:36,636 INFO L226 Difference]: Without dead ends: 3323 [2021-11-19 14:51:36,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:51:36,651 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1365 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:36,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 832 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:51:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-11-19 14:51:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3323. [2021-11-19 14:51:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3323 states, 2497 states have (on average 1.5550660792951543) internal successors, (3883), 2587 states have internal predecessors, (3883), 643 states have call successors, (643), 166 states have call predecessors, (643), 182 states have return successors, (704), 602 states have call predecessors, (704), 639 states have call successors, (704) [2021-11-19 14:51:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3323 states to 3323 states and 5230 transitions. [2021-11-19 14:51:36,935 INFO L78 Accepts]: Start accepts. Automaton has 3323 states and 5230 transitions. Word has length 171 [2021-11-19 14:51:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:36,937 INFO L470 AbstractCegarLoop]: Abstraction has 3323 states and 5230 transitions. [2021-11-19 14:51:36,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 5 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-19 14:51:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3323 states and 5230 transitions. [2021-11-19 14:51:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:51:36,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:36,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:36,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:37,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:37,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:37,363 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash 43447497, now seen corresponding path program 1 times [2021-11-19 14:51:37,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:37,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610683680] [2021-11-19 14:51:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:37,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:37,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:37,367 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:37,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:51:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:51:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:38,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:51:40,439 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:40,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610683680] [2021-11-19 14:51:40,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610683680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:40,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775700855] [2021-11-19 14:51:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:40,441 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:51:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:51:40,447 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:51:40,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:51:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:51:41,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:41,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:51:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775700855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:43,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415337739] [2021-11-19 14:51:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:43,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:51:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:51:43,059 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:51:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 14:51:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:51:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:44,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:51:45,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415337739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:51:45,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:51:45,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:51:45,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121588330] [2021-11-19 14:51:45,361 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:51:45,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:51:45,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:45,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:51:45,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:51:45,365 INFO L87 Difference]: Start difference. First operand 3323 states and 5230 transitions. Second operand has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:51:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:51:56,570 INFO L93 Difference]: Finished difference Result 11402 states and 18489 transitions. [2021-11-19 14:51:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:51:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 172 [2021-11-19 14:51:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:51:56,630 INFO L225 Difference]: With dead ends: 11402 [2021-11-19 14:51:56,630 INFO L226 Difference]: Without dead ends: 8159 [2021-11-19 14:51:56,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:51:56,648 INFO L933 BasicCegarLoop]: 1791 mSDtfsCounter, 5300 mSDsluCounter, 4375 mSDsCounter, 0 mSdLazyCounter, 8567 mSolverCounterSat, 2017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5385 SdHoareTripleChecker+Valid, 6166 SdHoareTripleChecker+Invalid, 10584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2017 IncrementalHoareTripleChecker+Valid, 8567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:51:56,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5385 Valid, 6166 Invalid, 10584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2017 Valid, 8567 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2021-11-19 14:51:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8159 states. [2021-11-19 14:51:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8159 to 7348. [2021-11-19 14:51:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7348 states, 5463 states have (on average 1.5546403075233388) internal successors, (8493), 5657 states have internal predecessors, (8493), 1488 states have call successors, (1488), 325 states have call predecessors, (1488), 396 states have return successors, (1773), 1446 states have call predecessors, (1773), 1484 states have call successors, (1773) [2021-11-19 14:51:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 11754 transitions. [2021-11-19 14:51:57,432 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 11754 transitions. Word has length 172 [2021-11-19 14:51:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:51:57,433 INFO L470 AbstractCegarLoop]: Abstraction has 7348 states and 11754 transitions. [2021-11-19 14:51:57,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.055555555555555) internal successors, (199), 14 states have internal predecessors, (199), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:51:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 11754 transitions. [2021-11-19 14:51:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 14:51:57,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:51:57,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:51:57,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:57,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:51:57,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-19 14:51:58,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:51:58,075 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:51:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:51:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1090611922, now seen corresponding path program 1 times [2021-11-19 14:51:58,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:51:58,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071428588] [2021-11-19 14:51:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:51:58,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:51:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:51:58,079 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:51:58,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:51:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:51:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:51:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:51:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:58,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:51:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:51:59,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:51:59,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071428588] [2021-11-19 14:51:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071428588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:51:59,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:51:59,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:51:59,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830926032] [2021-11-19 14:51:59,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:51:59,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:51:59,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:51:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:51:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:51:59,623 INFO L87 Difference]: Start difference. First operand 7348 states and 11754 transitions. Second operand has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 14:52:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:00,081 INFO L93 Difference]: Finished difference Result 10569 states and 16850 transitions. [2021-11-19 14:52:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:52:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 174 [2021-11-19 14:52:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:00,111 INFO L225 Difference]: With dead ends: 10569 [2021-11-19 14:52:00,111 INFO L226 Difference]: Without dead ends: 3291 [2021-11-19 14:52:00,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:00,145 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 89 mSDsluCounter, 6194 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 7090 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:00,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 7090 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:52:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-11-19 14:52:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3291. [2021-11-19 14:52:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2477 states have (on average 1.553492127573678) internal successors, (3848), 2567 states have internal predecessors, (3848), 631 states have call successors, (631), 166 states have call predecessors, (631), 182 states have return successors, (692), 590 states have call predecessors, (692), 627 states have call successors, (692) [2021-11-19 14:52:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5171 transitions. [2021-11-19 14:52:00,468 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5171 transitions. Word has length 174 [2021-11-19 14:52:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:00,469 INFO L470 AbstractCegarLoop]: Abstraction has 3291 states and 5171 transitions. [2021-11-19 14:52:00,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 14:52:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5171 transitions. [2021-11-19 14:52:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:52:00,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:00,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:00,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:00,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:00,692 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 874365074, now seen corresponding path program 1 times [2021-11-19 14:52:00,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:00,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104338982] [2021-11-19 14:52:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:00,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:00,694 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:00,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:52:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:52:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:52:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:52:02,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:02,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104338982] [2021-11-19 14:52:02,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104338982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:02,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816233039] [2021-11-19 14:52:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:02,994 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:52:02,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:52:02,995 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:52:02,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:52:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:52:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:52:04,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:52:05,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816233039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:05,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986015949] [2021-11-19 14:52:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:05,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:52:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:52:05,255 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:52:05,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 14:52:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:52:05,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:52:06,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:52:07,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986015949] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:07,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:52:07,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:52:07,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486380003] [2021-11-19 14:52:07,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:52:07,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:52:07,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:52:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:52:07,333 INFO L87 Difference]: Start difference. First operand 3291 states and 5171 transitions. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:52:10,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:10,381 INFO L93 Difference]: Finished difference Result 6554 states and 10396 transitions. [2021-11-19 14:52:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:52:10,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) Word has length 180 [2021-11-19 14:52:10,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:10,403 INFO L225 Difference]: With dead ends: 6554 [2021-11-19 14:52:10,404 INFO L226 Difference]: Without dead ends: 3341 [2021-11-19 14:52:10,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:52:10,418 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 2028 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:10,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 2041 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 14:52:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-11-19 14:52:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3315. [2021-11-19 14:52:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 2495 states have (on average 1.549498997995992) internal successors, (3866), 2585 states have internal predecessors, (3866), 631 states have call successors, (631), 166 states have call predecessors, (631), 188 states have return successors, (716), 596 states have call predecessors, (716), 627 states have call successors, (716) [2021-11-19 14:52:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 5213 transitions. [2021-11-19 14:52:10,700 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 5213 transitions. Word has length 180 [2021-11-19 14:52:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:10,701 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 5213 transitions. [2021-11-19 14:52:10,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (38), 5 states have call predecessors, (38), 8 states have return successors, (38), 10 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:52:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 5213 transitions. [2021-11-19 14:52:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 14:52:10,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:10,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:10,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:10,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-19 14:52:11,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-19 14:52:11,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:52:11,335 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:11,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:11,336 INFO L85 PathProgramCache]: Analyzing trace with hash 850029828, now seen corresponding path program 1 times [2021-11-19 14:52:11,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:11,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118433446] [2021-11-19 14:52:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:11,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:11,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:11,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:52:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:52:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:13,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:13,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118433446] [2021-11-19 14:52:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118433446] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:13,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252394888] [2021-11-19 14:52:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:13,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:52:13,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:52:13,197 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:52:13,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:52:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:13,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:52:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:14,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252394888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:14,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786596567] [2021-11-19 14:52:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:14,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:52:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:52:14,834 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:52:14,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 14:52:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:52:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:15,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:52:16,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786596567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:52:16,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:52:16,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:52:16,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666493335] [2021-11-19 14:52:16,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:52:16,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:52:16,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:16,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:52:16,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:52:16,418 INFO L87 Difference]: Start difference. First operand 3315 states and 5213 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-19 14:52:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:23,598 INFO L93 Difference]: Finished difference Result 11566 states and 18424 transitions. [2021-11-19 14:52:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:52:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) Word has length 181 [2021-11-19 14:52:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:23,637 INFO L225 Difference]: With dead ends: 11566 [2021-11-19 14:52:23,638 INFO L226 Difference]: Without dead ends: 8317 [2021-11-19 14:52:23,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1080 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:52:23,651 INFO L933 BasicCegarLoop]: 1454 mSDtfsCounter, 4779 mSDsluCounter, 1861 mSDsCounter, 0 mSdLazyCounter, 4562 mSolverCounterSat, 1437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4870 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 5999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1437 IncrementalHoareTripleChecker+Valid, 4562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:23,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4870 Valid, 3315 Invalid, 5999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1437 Valid, 4562 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2021-11-19 14:52:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8317 states. [2021-11-19 14:52:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8317 to 8265. [2021-11-19 14:52:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 6237 states have (on average 1.5260541927208593) internal successors, (9518), 6443 states have internal predecessors, (9518), 1519 states have call successors, (1519), 466 states have call predecessors, (1519), 508 states have return successors, (1866), 1432 states have call predecessors, (1866), 1515 states have call successors, (1866) [2021-11-19 14:52:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 12903 transitions. [2021-11-19 14:52:24,540 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 12903 transitions. Word has length 181 [2021-11-19 14:52:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:24,541 INFO L470 AbstractCegarLoop]: Abstraction has 8265 states and 12903 transitions. [2021-11-19 14:52:24,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (32), 5 states have call predecessors, (32), 6 states have return successors, (31), 7 states have call predecessors, (31), 5 states have call successors, (31) [2021-11-19 14:52:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 12903 transitions. [2021-11-19 14:52:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:52:24,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:24,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:24,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:24,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:25,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:25,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:52:25,164 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash 500857302, now seen corresponding path program 1 times [2021-11-19 14:52:25,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:25,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165631693] [2021-11-19 14:52:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:25,167 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:25,169 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:25,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:52:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:52:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:52:28,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 14:52:37,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:37,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165631693] [2021-11-19 14:52:37,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165631693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:37,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-19 14:52:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944323437] [2021-11-19 14:52:37,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:52:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:52:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:52:37,424 INFO L87 Difference]: Start difference. First operand 8265 states and 12903 transitions. Second operand has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) [2021-11-19 14:52:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:52:49,031 INFO L93 Difference]: Finished difference Result 21329 states and 33751 transitions. [2021-11-19 14:52:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:52:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) Word has length 183 [2021-11-19 14:52:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:52:49,136 INFO L225 Difference]: With dead ends: 21329 [2021-11-19 14:52:49,136 INFO L226 Difference]: Without dead ends: 13116 [2021-11-19 14:52:49,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:52:49,171 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 5575 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 7194 mSolverCounterSat, 1529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5694 SdHoareTripleChecker+Valid, 4116 SdHoareTripleChecker+Invalid, 8723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1529 IncrementalHoareTripleChecker+Valid, 7194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:52:49,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5694 Valid, 4116 Invalid, 8723 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1529 Valid, 7194 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-19 14:52:49,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2021-11-19 14:52:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 12613. [2021-11-19 14:52:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12613 states, 9332 states have (on average 1.5226103729104157) internal successors, (14209), 9716 states have internal predecessors, (14209), 2538 states have call successors, (2538), 682 states have call predecessors, (2538), 742 states have return successors, (3029), 2368 states have call predecessors, (3029), 2534 states have call successors, (3029) [2021-11-19 14:52:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12613 states to 12613 states and 19776 transitions. [2021-11-19 14:52:50,546 INFO L78 Accepts]: Start accepts. Automaton has 12613 states and 19776 transitions. Word has length 183 [2021-11-19 14:52:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:52:50,547 INFO L470 AbstractCegarLoop]: Abstraction has 12613 states and 19776 transitions. [2021-11-19 14:52:50,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.0) internal successors, (234), 13 states have internal predecessors, (234), 11 states have call successors, (42), 7 states have call predecessors, (42), 7 states have return successors, (41), 11 states have call predecessors, (41), 10 states have call successors, (41) [2021-11-19 14:52:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12613 states and 19776 transitions. [2021-11-19 14:52:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 14:52:50,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:52:50,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:52:50,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:52:50,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:52:50,771 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:52:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:52:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 754820137, now seen corresponding path program 1 times [2021-11-19 14:52:50,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:52:50,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033566150] [2021-11-19 14:52:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:52:50,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:52:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:52:50,775 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:52:50,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:52:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:52:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:52:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:52:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 14:52:52,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:52:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:52:53,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:52:53,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033566150] [2021-11-19 14:52:53,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033566150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:52:53,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:52:53,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:52:53,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672275930] [2021-11-19 14:52:53,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:52:53,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:52:53,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:52:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:52:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:52:53,103 INFO L87 Difference]: Start difference. First operand 12613 states and 19776 transitions. Second operand has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:53:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:05,589 INFO L93 Difference]: Finished difference Result 39082 states and 63621 transitions. [2021-11-19 14:53:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 14:53:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) Word has length 187 [2021-11-19 14:53:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:05,828 INFO L225 Difference]: With dead ends: 39082 [2021-11-19 14:53:05,829 INFO L226 Difference]: Without dead ends: 26523 [2021-11-19 14:53:05,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:53:05,917 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 2465 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 9175 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2569 SdHoareTripleChecker+Valid, 5648 SdHoareTripleChecker+Invalid, 10111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 9175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:05,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2569 Valid, 5648 Invalid, 10111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [936 Valid, 9175 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 14:53:05,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26523 states. [2021-11-19 14:53:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26523 to 24560. [2021-11-19 14:53:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24560 states, 17559 states have (on average 1.5162025172276326) internal successors, (26623), 18523 states have internal predecessors, (26623), 5649 states have call successors, (5649), 1119 states have call predecessors, (5649), 1351 states have return successors, (7032), 5449 states have call predecessors, (7032), 5645 states have call successors, (7032) [2021-11-19 14:53:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24560 states to 24560 states and 39304 transitions. [2021-11-19 14:53:08,946 INFO L78 Accepts]: Start accepts. Automaton has 24560 states and 39304 transitions. Word has length 187 [2021-11-19 14:53:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:08,947 INFO L470 AbstractCegarLoop]: Abstraction has 24560 states and 39304 transitions. [2021-11-19 14:53:08,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.285714285714286) internal successors, (214), 12 states have internal predecessors, (214), 8 states have call successors, (39), 6 states have call predecessors, (39), 7 states have return successors, (39), 10 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:53:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24560 states and 39304 transitions. [2021-11-19 14:53:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 14:53:08,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:08,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:08,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-19 14:53:09,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:09,171 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 262193963, now seen corresponding path program 1 times [2021-11-19 14:53:09,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:09,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662065666] [2021-11-19 14:53:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:09,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:09,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:09,175 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:09,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:53:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:53:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:53:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:53:11,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:11,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662065666] [2021-11-19 14:53:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662065666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:11,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:11,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:53:11,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431054048] [2021-11-19 14:53:11,985 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:53:11,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:53:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:53:11,987 INFO L87 Difference]: Start difference. First operand 24560 states and 39304 transitions. Second operand has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:53:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:19,248 INFO L93 Difference]: Finished difference Result 45759 states and 73575 transitions. [2021-11-19 14:53:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:53:19,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) Word has length 187 [2021-11-19 14:53:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:19,389 INFO L225 Difference]: With dead ends: 45759 [2021-11-19 14:53:19,389 INFO L226 Difference]: Without dead ends: 24425 [2021-11-19 14:53:19,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:53:19,467 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1385 mSDsluCounter, 2738 mSDsCounter, 0 mSdLazyCounter, 5483 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 3540 SdHoareTripleChecker+Invalid, 5878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 5483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:19,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 3540 Invalid, 5878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 5483 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-19 14:53:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24425 states. [2021-11-19 14:53:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24425 to 24425. [2021-11-19 14:53:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24425 states, 17484 states have (on average 1.5158430565088081) internal successors, (26503), 18448 states have internal predecessors, (26503), 5604 states have call successors, (5604), 1104 states have call predecessors, (5604), 1336 states have return successors, (6987), 5404 states have call predecessors, (6987), 5600 states have call successors, (6987) [2021-11-19 14:53:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24425 states to 24425 states and 39094 transitions. [2021-11-19 14:53:22,199 INFO L78 Accepts]: Start accepts. Automaton has 24425 states and 39094 transitions. Word has length 187 [2021-11-19 14:53:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:22,201 INFO L470 AbstractCegarLoop]: Abstraction has 24425 states and 39094 transitions. [2021-11-19 14:53:22,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 14 states have internal predecessors, (196), 8 states have call successors, (37), 5 states have call predecessors, (37), 10 states have return successors, (39), 12 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:53:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 24425 states and 39094 transitions. [2021-11-19 14:53:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-19 14:53:22,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:22,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:22,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-19 14:53:22,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:22,427 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:22,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1567972864, now seen corresponding path program 1 times [2021-11-19 14:53:22,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:22,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289950820] [2021-11-19 14:53:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:22,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:22,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:22,429 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:22,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:53:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:53:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:53:23,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:53:24,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:24,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289950820] [2021-11-19 14:53:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289950820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:24,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:24,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:53:24,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934063083] [2021-11-19 14:53:24,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:53:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:53:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:53:24,438 INFO L87 Difference]: Start difference. First operand 24425 states and 39094 transitions. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:53:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:34,848 INFO L93 Difference]: Finished difference Result 84543 states and 140806 transitions. [2021-11-19 14:53:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:53:34,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) Word has length 194 [2021-11-19 14:53:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:35,467 INFO L225 Difference]: With dead ends: 84543 [2021-11-19 14:53:35,468 INFO L226 Difference]: Without dead ends: 60183 [2021-11-19 14:53:35,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:53:35,584 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 4062 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 1312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 4082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1312 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:35,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4165 Valid, 3008 Invalid, 4082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1312 Valid, 2770 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:53:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60183 states. [2021-11-19 14:53:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60183 to 55275. [2021-11-19 14:53:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55275 states, 38003 states have (on average 1.5121437781227798) internal successors, (57466), 40556 states have internal predecessors, (57466), 14540 states have call successors, (14540), 1978 states have call predecessors, (14540), 2731 states have return successors, (18892), 14434 states have call predecessors, (18892), 14536 states have call successors, (18892) [2021-11-19 14:53:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55275 states to 55275 states and 90898 transitions. [2021-11-19 14:53:41,986 INFO L78 Accepts]: Start accepts. Automaton has 55275 states and 90898 transitions. Word has length 194 [2021-11-19 14:53:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:41,987 INFO L470 AbstractCegarLoop]: Abstraction has 55275 states and 90898 transitions. [2021-11-19 14:53:41,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:53:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 55275 states and 90898 transitions. [2021-11-19 14:53:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:53:41,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:41,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:53:42,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-19 14:53:42,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:53:42,211 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1881590044, now seen corresponding path program 1 times [2021-11-19 14:53:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:53:42,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63809845] [2021-11-19 14:53:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:42,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:53:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:53:42,213 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:53:42,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_214a6c72-afa1-4c6f-b4dc-492df87e77ad/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:53:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:53:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:53:43,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:53:44,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:53:44,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63809845] [2021-11-19 14:53:44,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63809845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:44,092 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:44,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 14:53:44,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610602769] [2021-11-19 14:53:44,092 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:44,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:53:44,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:53:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:53:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:53:44,094 INFO L87 Difference]: Start difference. First operand 55275 states and 90898 transitions. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 8 states have call successors, (37), 6 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 7 states have call successors, (36)