./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:15:34,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:15:34,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:15:34,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:15:34,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:15:34,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:15:34,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:15:34,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:15:34,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:15:34,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:15:34,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:15:34,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:15:34,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:15:34,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:15:34,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:15:34,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:15:34,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:15:34,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:15:34,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:15:34,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:15:34,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:15:34,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:15:34,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:15:34,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:15:34,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:15:34,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:15:34,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:15:34,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:15:34,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:15:34,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:15:34,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:15:34,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:15:34,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:15:34,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:15:34,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:15:34,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:15:34,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:15:34,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:15:34,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:15:34,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:15:34,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:15:34,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:15:34,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:15:34,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:15:34,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:15:34,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:15:34,701 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:15:34,702 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:15:34,702 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:15:34,702 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:15:34,702 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:15:34,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:15:34,703 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:15:34,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:15:34,704 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:15:34,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:15:34,705 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:15:34,705 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:15:34,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:15:34,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:15:34,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:15:34,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:15:34,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:15:34,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:15:34,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:15:34,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:15:34,708 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:15:34,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:15:34,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:15:34,708 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:15:34,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:15:34,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:15:34,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:15:34,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:15:34,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:15:34,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:15:34,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:15:34,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:15:34,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:15:34,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:15:34,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:15:34,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:15:34,713 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_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2021-11-12 22:15:34,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:15:34,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:15:34,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:15:34,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:15:34,992 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:15:34,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-12 22:15:35,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/44e81c240/f054e83fdbe549cc92fa0aecee70f964/FLAG345317902 [2021-11-12 22:15:35,815 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:15:35,816 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-12 22:15:35,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/44e81c240/f054e83fdbe549cc92fa0aecee70f964/FLAG345317902 [2021-11-12 22:15:35,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/44e81c240/f054e83fdbe549cc92fa0aecee70f964 [2021-11-12 22:15:36,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:15:36,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:15:36,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:36,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:15:36,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:15:36,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:35" (1/1) ... [2021-11-12 22:15:36,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4f9a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:36, skipping insertion in model container [2021-11-12 22:15:36,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:35" (1/1) ... [2021-11-12 22:15:36,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:15:36,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:15:36,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-12 22:15:36,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:36,739 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) [2021-11-12 22:15:36,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66cf9abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:36, skipping insertion in model container [2021-11-12 22:15:36,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:36,741 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:15:36,743 INFO L158 Benchmark]: Toolchain (without parser) took 739.81ms. Allocated memory is still 102.8MB. Free memory was 65.6MB in the beginning and 61.8MB in the end (delta: 3.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:15:36,744 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:15:36,746 INFO L158 Benchmark]: CACSL2BoogieTranslator took 737.22ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 61.8MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:15:36,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory is still 55.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 737.22ms. Allocated memory is still 102.8MB. Free memory was 65.4MB in the beginning and 61.8MB in the end (delta: 3.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:15:38,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:15:38,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:15:39,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:15:39,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:15:39,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:15:39,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:15:39,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:15:39,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:15:39,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:15:39,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:15:39,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:15:39,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:15:39,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:15:39,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:15:39,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:15:39,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:15:39,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:15:39,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:15:39,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:15:39,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:15:39,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:15:39,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:15:39,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:15:39,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:15:39,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:15:39,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:15:39,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:15:39,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:15:39,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:15:39,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:15:39,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:15:39,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:15:39,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:15:39,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:15:39,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:15:39,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:15:39,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:15:39,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:15:39,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:15:39,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:15:39,103 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:15:39,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:15:39,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:15:39,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:15:39,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:15:39,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:15:39,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:15:39,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:15:39,147 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:15:39,147 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:15:39,147 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:15:39,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:15:39,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:15:39,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:15:39,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:15:39,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:15:39,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:15:39,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:15:39,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:15:39,152 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:15:39,152 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:15:39,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:15:39,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:15:39,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:15:39,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:15:39,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:15:39,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:15:39,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:15:39,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:15:39,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:15:39,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:15:39,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:15:39,156 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:15:39,156 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:15:39,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:15:39,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:15:39,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:15:39,158 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_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2021-11-12 22:15:39,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:15:39,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:15:39,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:15:39,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:15:39,573 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:15:39,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-12 22:15:39,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/35b6d52c6/f717a7067c034907b7483d298b8d1433/FLAG94f0eff11 [2021-11-12 22:15:40,300 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:15:40,301 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2021-11-12 22:15:40,331 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/35b6d52c6/f717a7067c034907b7483d298b8d1433/FLAG94f0eff11 [2021-11-12 22:15:40,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/data/35b6d52c6/f717a7067c034907b7483d298b8d1433 [2021-11-12 22:15:40,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:15:40,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:15:40,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:40,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:15:40,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:15:40,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:40" (1/1) ... [2021-11-12 22:15:40,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28017aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:40, skipping insertion in model container [2021-11-12 22:15:40,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:15:40" (1/1) ... [2021-11-12 22:15:40,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:15:40,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:15:40,937 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-12 22:15:41,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:41,240 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:15:41,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:15:41,290 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-12 22:15:41,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:41,393 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:15:41,419 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2021-11-12 22:15:41,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:15:41,572 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:15:41,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41 WrapperNode [2021-11-12 22:15:41,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:15:41,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:15:41,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:15:41,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:15:41,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:15:41,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:15:41,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:15:41,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:15:41,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:15:41,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:15:41,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:15:41,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:15:41,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (1/1) ... [2021-11-12 22:15:41,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:15:41,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:15:41,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:15:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:15:41,919 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 22:15:41,919 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 22:15:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 22:15:41,920 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 22:15:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:15:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:15:41,920 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:15:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:15:41,920 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:15:41,920 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:15:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:15:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:15:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-12 22:15:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:15:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:15:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:15:41,921 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:15:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 22:15:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 22:15:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:15:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:15:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:15:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:15:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:15:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:15:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:15:41,923 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:15:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:15:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 22:15:41,923 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 22:15:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:15:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:15:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:15:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:15:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:15:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:15:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:15:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:15:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:15:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:15:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2021-11-12 22:15:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2021-11-12 22:15:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:15:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:15:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:15:41,926 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:15:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:15:41,926 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:15:41,926 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:15:41,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:15:41,928 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:15:41,928 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-12 22:15:41,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:15:41,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:15:41,929 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:15:41,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:15:45,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:15:45,825 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:15:45,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:15:45 BoogieIcfgContainer [2021-11-12 22:15:45,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:15:45,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:15:45,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:15:45,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:15:45,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:15:40" (1/3) ... [2021-11-12 22:15:45,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11008d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:15:45, skipping insertion in model container [2021-11-12 22:15:45,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:15:41" (2/3) ... [2021-11-12 22:15:45,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11008d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:15:45, skipping insertion in model container [2021-11-12 22:15:45,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:15:45" (3/3) ... [2021-11-12 22:15:45,836 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2021-11-12 22:15:45,841 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:15:45,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:15:45,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:15:45,897 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 [2021-11-12 22:15:45,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:15:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 452 states have (on average 1.6924778761061947) internal successors, (765), 475 states have internal predecessors, (765), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-12 22:15:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:15:45,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:45,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:45,945 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1316381237, now seen corresponding path program 1 times [2021-11-12 22:15:45,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:45,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386012523] [2021-11-12 22:15:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:45,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:45,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:45,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:45,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:15:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:46,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:15:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:46,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:46,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:46,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386012523] [2021-11-12 22:15:46,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386012523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:46,939 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:46,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:15:46,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830318411] [2021-11-12 22:15:46,941 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:15:46,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:15:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:15:46,974 INFO L87 Difference]: Start difference. First operand has 576 states, 452 states have (on average 1.6924778761061947) internal successors, (765), 475 states have internal predecessors, (765), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 22:15:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:47,045 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2021-11-12 22:15:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:15:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 62 [2021-11-12 22:15:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:47,099 INFO L225 Difference]: With dead ends: 597 [2021-11-12 22:15:47,099 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 22:15:47,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:15:47,106 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:47,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 6.97ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:15:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 22:15:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 22:15:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 446 states have (on average 1.6905829596412556) internal successors, (754), 467 states have internal predecessors, (754), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 941 transitions. [2021-11-12 22:15:47,224 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 941 transitions. Word has length 62 [2021-11-12 22:15:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:47,227 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 941 transitions. [2021-11-12 22:15:47,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 22:15:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 941 transitions. [2021-11-12 22:15:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 22:15:47,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:47,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:47,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:47,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:47,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash 61497577, now seen corresponding path program 1 times [2021-11-12 22:15:47,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:47,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457820263] [2021-11-12 22:15:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:47,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:47,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:15:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:47,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:15:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:48,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:48,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:48,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457820263] [2021-11-12 22:15:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457820263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:48,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:15:48,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100244844] [2021-11-12 22:15:48,386 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:48,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:15:48,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:15:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:15:48,389 INFO L87 Difference]: Start difference. First operand 568 states and 941 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:15:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:48,551 INFO L93 Difference]: Finished difference Result 1120 states and 1860 transitions. [2021-11-12 22:15:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 64 [2021-11-12 22:15:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:48,562 INFO L225 Difference]: With dead ends: 1120 [2021-11-12 22:15:48,562 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 22:15:48,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:15:48,572 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 15 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3705 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.76ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:48,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 3705 Invalid, 36 Unknown, 0 Unchecked, 26.76ms Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 34.31ms Time] [2021-11-12 22:15:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 22:15:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 22:15:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 446 states have (on average 1.6771300448430493) internal successors, (748), 467 states have internal predecessors, (748), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 935 transitions. [2021-11-12 22:15:48,635 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 935 transitions. Word has length 64 [2021-11-12 22:15:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:48,636 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 935 transitions. [2021-11-12 22:15:48,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:15:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 935 transitions. [2021-11-12 22:15:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-12 22:15:48,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:48,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:48,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:48,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:48,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1984723350, now seen corresponding path program 1 times [2021-11-12 22:15:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:48,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109899905] [2021-11-12 22:15:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:48,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:48,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:15:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:15:49,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:49,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:49,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:49,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109899905] [2021-11-12 22:15:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109899905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:49,913 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:15:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296864487] [2021-11-12 22:15:49,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:15:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:15:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:15:49,915 INFO L87 Difference]: Start difference. First operand 568 states and 935 transitions. Second operand has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:15:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:50,118 INFO L93 Difference]: Finished difference Result 1078 states and 1777 transitions. [2021-11-12 22:15:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:15:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 69 [2021-11-12 22:15:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:50,126 INFO L225 Difference]: With dead ends: 1078 [2021-11-12 22:15:50,126 INFO L226 Difference]: Without dead ends: 562 [2021-11-12 22:15:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:15:50,133 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 214 mSDsluCounter, 4589 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5511 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 5511 Invalid, 79 Unknown, 0 Unchecked, 14.91ms Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 93.12ms Time] [2021-11-12 22:15:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-12 22:15:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-12 22:15:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 440 states have (on average 1.6704545454545454) internal successors, (735), 461 states have internal predecessors, (735), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 922 transitions. [2021-11-12 22:15:50,177 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 922 transitions. Word has length 69 [2021-11-12 22:15:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 922 transitions. [2021-11-12 22:15:50,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:15:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 922 transitions. [2021-11-12 22:15:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-12 22:15:50,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:50,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:50,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:50,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1693135546, now seen corresponding path program 1 times [2021-11-12 22:15:50,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:50,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571627126] [2021-11-12 22:15:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:50,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:50,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:50,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:50,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:15:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:15:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:51,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:51,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571627126] [2021-11-12 22:15:51,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571627126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:51,321 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:51,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:15:51,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855050761] [2021-11-12 22:15:51,322 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:51,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:15:51,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:15:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:15:51,323 INFO L87 Difference]: Start difference. First operand 562 states and 922 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:15:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:51,509 INFO L93 Difference]: Finished difference Result 1081 states and 1778 transitions. [2021-11-12 22:15:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:15:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 70 [2021-11-12 22:15:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:51,516 INFO L225 Difference]: With dead ends: 1081 [2021-11-12 22:15:51,516 INFO L226 Difference]: Without dead ends: 562 [2021-11-12 22:15:51,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:15:51,520 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 174 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.14ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.40ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:51,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2606 Invalid, 124 Unknown, 0 Unchecked, 7.14ms Time], IncrementalHoareTripleChecker [26 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 119.40ms Time] [2021-11-12 22:15:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-12 22:15:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 562. [2021-11-12 22:15:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 440 states have (on average 1.615909090909091) internal successors, (711), 461 states have internal predecessors, (711), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 898 transitions. [2021-11-12 22:15:51,547 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 898 transitions. Word has length 70 [2021-11-12 22:15:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:51,547 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 898 transitions. [2021-11-12 22:15:51,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 22:15:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 898 transitions. [2021-11-12 22:15:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-12 22:15:51,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:51,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:51,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:51,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:51,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1273587499, now seen corresponding path program 1 times [2021-11-12 22:15:51,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:51,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238868637] [2021-11-12 22:15:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:51,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:51,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:51,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:51,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:15:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:15:52,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:52,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:52,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238868637] [2021-11-12 22:15:52,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238868637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:52,731 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:52,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:15:52,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64552649] [2021-11-12 22:15:52,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:52,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:15:52,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:15:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:15:52,733 INFO L87 Difference]: Start difference. First operand 562 states and 898 transitions. Second operand has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:15:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:52,894 INFO L93 Difference]: Finished difference Result 1072 states and 1740 transitions. [2021-11-12 22:15:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:15:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2021-11-12 22:15:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:52,901 INFO L225 Difference]: With dead ends: 1072 [2021-11-12 22:15:52,901 INFO L226 Difference]: Without dead ends: 541 [2021-11-12 22:15:52,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:15:52,905 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 89 mSDsluCounter, 5215 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6101 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:52,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6101 Invalid, 60 Unknown, 0 Unchecked, 11.62ms Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 81.94ms Time] [2021-11-12 22:15:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-12 22:15:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-12 22:15:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 419 states have (on average 1.6372315035799523) internal successors, (686), 440 states have internal predecessors, (686), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 873 transitions. [2021-11-12 22:15:52,930 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 873 transitions. Word has length 72 [2021-11-12 22:15:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:52,931 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 873 transitions. [2021-11-12 22:15:52,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 22:15:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 873 transitions. [2021-11-12 22:15:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-12 22:15:52,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:52,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:52,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:53,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:53,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash -655552937, now seen corresponding path program 1 times [2021-11-12 22:15:53,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:53,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072455861] [2021-11-12 22:15:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:53,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:53,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:53,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:53,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:15:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:15:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:53,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:54,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:54,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072455861] [2021-11-12 22:15:54,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072455861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:54,214 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:54,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:15:54,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217655159] [2021-11-12 22:15:54,214 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:54,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:15:54,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:15:54,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:15:54,216 INFO L87 Difference]: Start difference. First operand 541 states and 873 transitions. Second operand has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:15:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:15:54,418 INFO L93 Difference]: Finished difference Result 1045 states and 1704 transitions. [2021-11-12 22:15:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:15:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 75 [2021-11-12 22:15:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:15:54,425 INFO L225 Difference]: With dead ends: 1045 [2021-11-12 22:15:54,426 INFO L226 Difference]: Without dead ends: 541 [2021-11-12 22:15:54,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:15:54,430 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 46 mSDsluCounter, 5127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 5985 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.26ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:15:54,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 5985 Invalid, 85 Unknown, 0 Unchecked, 15.26ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 98.22ms Time] [2021-11-12 22:15:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-12 22:15:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-12 22:15:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 419 states have (on average 1.6348448687350836) internal successors, (685), 440 states have internal predecessors, (685), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-12 22:15:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 872 transitions. [2021-11-12 22:15:54,461 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 872 transitions. Word has length 75 [2021-11-12 22:15:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:15:54,462 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 872 transitions. [2021-11-12 22:15:54,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 4 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-12 22:15:54,462 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 872 transitions. [2021-11-12 22:15:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-12 22:15:54,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:15:54,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:15:54,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:15:54,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:15:54,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:15:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:15:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash -21779899, now seen corresponding path program 1 times [2021-11-12 22:15:54,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:15:54,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624910651] [2021-11-12 22:15:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:15:54,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:15:54,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:15:54,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:15:54,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:15:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:15:55,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:15:55,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:15:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:55,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:15:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:15:56,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:15:56,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624910651] [2021-11-12 22:15:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624910651] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:15:56,179 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:15:56,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-12 22:15:56,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732412119] [2021-11-12 22:15:56,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:15:56,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:15:56,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:15:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:15:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:15:56,181 INFO L87 Difference]: Start difference. First operand 541 states and 872 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-12 22:15:58,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:00,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:02,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:10,641 INFO L93 Difference]: Finished difference Result 2717 states and 4517 transitions. [2021-11-12 22:16:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:16:10,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 76 [2021-11-12 22:16:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:10,662 INFO L225 Difference]: With dead ends: 2717 [2021-11-12 22:16:10,662 INFO L226 Difference]: Without dead ends: 2221 [2021-11-12 22:16:10,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:16:10,668 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 7833 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 2133 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12769.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8007 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 6488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.64ms SdHoareTripleChecker+Time, 2133 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14046.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:10,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8007 Valid, 3097 Invalid, 6488 Unknown, 0 Unchecked, 59.64ms Time], IncrementalHoareTripleChecker [2133 Valid, 4352 Invalid, 3 Unknown, 0 Unchecked, 14046.82ms Time] [2021-11-12 22:16:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-12 22:16:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2033. [2021-11-12 22:16:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1572 states have (on average 1.671119592875318) internal successors, (2627), 1637 states have internal predecessors, (2627), 375 states have call successors, (375), 82 states have call predecessors, (375), 85 states have return successors, (383), 340 states have call predecessors, (383), 370 states have call successors, (383) [2021-11-12 22:16:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 3385 transitions. [2021-11-12 22:16:10,801 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 3385 transitions. Word has length 76 [2021-11-12 22:16:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:10,801 INFO L470 AbstractCegarLoop]: Abstraction has 2033 states and 3385 transitions. [2021-11-12 22:16:10,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 8 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-12 22:16:10,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 3385 transitions. [2021-11-12 22:16:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 22:16:10,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:10,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:10,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:16:11,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:16:11,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash 295445077, now seen corresponding path program 1 times [2021-11-12 22:16:11,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:16:11,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002782923] [2021-11-12 22:16:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:11,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:16:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:16:11,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:16:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:16:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:16:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:16:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:16:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:12,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:16:12,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002782923] [2021-11-12 22:16:12,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002782923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:12,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:12,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:16:12,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404811040] [2021-11-12 22:16:12,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:12,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:16:12,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:16:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:16:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:16:12,472 INFO L87 Difference]: Start difference. First operand 2033 states and 3385 transitions. Second operand has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-12 22:16:14,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:16,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:25,203 INFO L93 Difference]: Finished difference Result 5370 states and 8950 transitions. [2021-11-12 22:16:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:16:25,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 114 [2021-11-12 22:16:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:25,234 INFO L225 Difference]: With dead ends: 5370 [2021-11-12 22:16:25,234 INFO L226 Difference]: Without dead ends: 3382 [2021-11-12 22:16:25,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:16:25,251 INFO L933 BasicCegarLoop]: 1776 mSDtfsCounter, 3011 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 7348 mSolverCounterSat, 966 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10987.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 4986 SdHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.91ms SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 7348 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12133.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:25,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3098 Valid, 4986 Invalid, 8316 Unknown, 0 Unchecked, 47.91ms Time], IncrementalHoareTripleChecker [966 Valid, 7348 Invalid, 2 Unknown, 0 Unchecked, 12133.53ms Time] [2021-11-12 22:16:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-11-12 22:16:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2910. [2021-11-12 22:16:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2208 states have (on average 1.6376811594202898) internal successors, (3616), 2299 states have internal predecessors, (3616), 566 states have call successors, (566), 119 states have call predecessors, (566), 135 states have return successors, (602), 524 states have call predecessors, (602), 561 states have call successors, (602) [2021-11-12 22:16:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4784 transitions. [2021-11-12 22:16:25,489 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4784 transitions. Word has length 114 [2021-11-12 22:16:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4784 transitions. [2021-11-12 22:16:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.692307692307692) internal successors, (126), 11 states have internal predecessors, (126), 7 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-12 22:16:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4784 transitions. [2021-11-12 22:16:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 22:16:25,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:25,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:25,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:16:25,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:16:25,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1863411271, now seen corresponding path program 1 times [2021-11-12 22:16:25,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:16:25,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600816931] [2021-11-12 22:16:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:25,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:16:25,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:16:25,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:16:25,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:16:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:16:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:16:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:26,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:16:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:27,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:16:27,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600816931] [2021-11-12 22:16:27,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600816931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:27,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:27,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:16:27,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330442446] [2021-11-12 22:16:27,656 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:27,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:16:27,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:16:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:16:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:16:27,658 INFO L87 Difference]: Start difference. First operand 2910 states and 4784 transitions. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 22:16:29,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:31,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:33,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:37,409 INFO L93 Difference]: Finished difference Result 6566 states and 11007 transitions. [2021-11-12 22:16:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:16:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) Word has length 115 [2021-11-12 22:16:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:37,470 INFO L225 Difference]: With dead ends: 6566 [2021-11-12 22:16:37,470 INFO L226 Difference]: Without dead ends: 3701 [2021-11-12 22:16:37,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:16:37,491 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 2066 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2776 mSolverCounterSat, 693 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8975.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.08ms SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 2776 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9422.61ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:37,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 2252 Invalid, 3472 Unknown, 0 Unchecked, 20.08ms Time], IncrementalHoareTripleChecker [693 Valid, 2776 Invalid, 3 Unknown, 0 Unchecked, 9422.61ms Time] [2021-11-12 22:16:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-11-12 22:16:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 2934. [2021-11-12 22:16:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2226 states have (on average 1.632524707996406) internal successors, (3634), 2317 states have internal predecessors, (3634), 566 states have call successors, (566), 119 states have call predecessors, (566), 141 states have return successors, (668), 530 states have call predecessors, (668), 561 states have call successors, (668) [2021-11-12 22:16:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4868 transitions. [2021-11-12 22:16:37,753 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4868 transitions. Word has length 115 [2021-11-12 22:16:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:37,754 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4868 transitions. [2021-11-12 22:16:37,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 12 states have internal predecessors, (154), 8 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (26), 10 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-12 22:16:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4868 transitions. [2021-11-12 22:16:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:16:37,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:37,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:16:37,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:16:37,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:16:37,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -813515636, now seen corresponding path program 1 times [2021-11-12 22:16:37,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:16:37,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960022115] [2021-11-12 22:16:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:37,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:16:37,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:16:37,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:16:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:16:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:38,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:16:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:16:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:16:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:16:39,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:16:39,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960022115] [2021-11-12 22:16:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960022115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:16:39,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:16:39,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-11-12 22:16:39,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496551995] [2021-11-12 22:16:39,408 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:16:39,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:16:39,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:16:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:16:39,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:16:39,409 INFO L87 Difference]: Start difference. First operand 2934 states and 4868 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:16:41,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:43,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:45,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:16:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:16:52,239 INFO L93 Difference]: Finished difference Result 9627 states and 16435 transitions. [2021-11-12 22:16:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:16:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 116 [2021-11-12 22:16:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:16:52,332 INFO L225 Difference]: With dead ends: 9627 [2021-11-12 22:16:52,332 INFO L226 Difference]: Without dead ends: 6738 [2021-11-12 22:16:52,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:16:52,358 INFO L933 BasicCegarLoop]: 1429 mSDtfsCounter, 3394 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 5008 mSolverCounterSat, 932 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11433.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3784 SdHoareTripleChecker+Invalid, 5943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.93ms SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 5008 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12271.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:16:52,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3784 Invalid, 5943 Unknown, 0 Unchecked, 38.93ms Time], IncrementalHoareTripleChecker [932 Valid, 5008 Invalid, 3 Unknown, 0 Unchecked, 12271.80ms Time] [2021-11-12 22:16:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2021-11-12 22:16:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 6342. [2021-11-12 22:16:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6342 states, 4792 states have (on average 1.6181135225375627) internal successors, (7754), 5010 states have internal predecessors, (7754), 1227 states have call successors, (1227), 286 states have call predecessors, (1227), 322 states have return successors, (1437), 1122 states have call predecessors, (1437), 1222 states have call successors, (1437) [2021-11-12 22:16:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6342 states to 6342 states and 10418 transitions. [2021-11-12 22:16:52,920 INFO L78 Accepts]: Start accepts. Automaton has 6342 states and 10418 transitions. Word has length 116 [2021-11-12 22:16:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:16:52,921 INFO L470 AbstractCegarLoop]: Abstraction has 6342 states and 10418 transitions. [2021-11-12 22:16:52,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 6 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:16:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 6342 states and 10418 transitions. [2021-11-12 22:16:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:16:52,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:16:52,927 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:16:52,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-12 22:16:53,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:16:53,141 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:16:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:16:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1859421445, now seen corresponding path program 1 times [2021-11-12 22:16:53,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:16:53,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112018001] [2021-11-12 22:16:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:16:53,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:16:53,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:16:53,143 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:16:53,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:16:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:16:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:16:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:16:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:16:55,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:17:00,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:00,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112018001] [2021-11-12 22:17:00,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112018001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:00,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:00,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-11-12 22:17:00,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116389964] [2021-11-12 22:17:00,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:17:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:17:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:17:00,531 INFO L87 Difference]: Start difference. First operand 6342 states and 10418 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-12 22:17:02,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:04,566 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:13,731 INFO L93 Difference]: Finished difference Result 15854 states and 26237 transitions. [2021-11-12 22:17:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:17:13,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) Word has length 118 [2021-11-12 22:17:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:13,804 INFO L225 Difference]: With dead ends: 15854 [2021-11-12 22:17:13,804 INFO L226 Difference]: Without dead ends: 9557 [2021-11-12 22:17:13,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:17:13,833 INFO L933 BasicCegarLoop]: 1561 mSDtfsCounter, 5114 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 6851 mSolverCounterSat, 1308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11079.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5184 SdHoareTripleChecker+Valid, 3993 SdHoareTripleChecker+Invalid, 8161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.62ms SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 6851 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12185.89ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:13,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5184 Valid, 3993 Invalid, 8161 Unknown, 0 Unchecked, 35.62ms Time], IncrementalHoareTripleChecker [1308 Valid, 6851 Invalid, 2 Unknown, 0 Unchecked, 12185.89ms Time] [2021-11-12 22:17:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9557 states. [2021-11-12 22:17:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9557 to 8995. [2021-11-12 22:17:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 6726 states have (on average 1.6128456735057983) internal successors, (10848), 7058 states have internal predecessors, (10848), 1818 states have call successors, (1818), 400 states have call predecessors, (1818), 450 states have return successors, (2124), 1657 states have call predecessors, (2124), 1813 states have call successors, (2124) [2021-11-12 22:17:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 14790 transitions. [2021-11-12 22:17:14,597 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 14790 transitions. Word has length 118 [2021-11-12 22:17:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:14,598 INFO L470 AbstractCegarLoop]: Abstraction has 8995 states and 14790 transitions. [2021-11-12 22:17:14,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 9 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-12 22:17:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 14790 transitions. [2021-11-12 22:17:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:17:14,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:14,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:14,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-12 22:17:14,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:14,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash -597100899, now seen corresponding path program 1 times [2021-11-12 22:17:14,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:14,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474777120] [2021-11-12 22:17:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:14,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:14,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:17:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:17:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:15,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:16,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:16,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474777120] [2021-11-12 22:17:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474777120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:16,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:16,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-12 22:17:16,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742590099] [2021-11-12 22:17:16,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:16,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:17:16,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:17:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:17:16,449 INFO L87 Difference]: Start difference. First operand 8995 states and 14790 transitions. Second operand has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:17:18,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:20,475 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:22,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:32,815 INFO L93 Difference]: Finished difference Result 31178 states and 53093 transitions. [2021-11-12 22:17:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:17:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) Word has length 122 [2021-11-12 22:17:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:32,964 INFO L225 Difference]: With dead ends: 31178 [2021-11-12 22:17:32,964 INFO L226 Difference]: Without dead ends: 22186 [2021-11-12 22:17:33,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:17:33,080 INFO L933 BasicCegarLoop]: 1806 mSDtfsCounter, 4966 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 7188 mSolverCounterSat, 2339 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13769.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5062 SdHoareTripleChecker+Valid, 4675 SdHoareTripleChecker+Invalid, 9530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.10ms SdHoareTripleChecker+Time, 2339 IncrementalHoareTripleChecker+Valid, 7188 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14946.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:33,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5062 Valid, 4675 Invalid, 9530 Unknown, 0 Unchecked, 43.10ms Time], IncrementalHoareTripleChecker [2339 Valid, 7188 Invalid, 3 Unknown, 0 Unchecked, 14946.62ms Time] [2021-11-12 22:17:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22186 states. [2021-11-12 22:17:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22186 to 17458. [2021-11-12 22:17:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17458 states, 12574 states have (on average 1.5903451566724989) internal successors, (19997), 13368 states have internal predecessors, (19997), 4031 states have call successors, (4031), 674 states have call predecessors, (4031), 852 states have return successors, (4925), 3833 states have call predecessors, (4925), 4026 states have call successors, (4925) [2021-11-12 22:17:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17458 states to 17458 states and 28953 transitions. [2021-11-12 22:17:34,641 INFO L78 Accepts]: Start accepts. Automaton has 17458 states and 28953 transitions. Word has length 122 [2021-11-12 22:17:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:34,642 INFO L470 AbstractCegarLoop]: Abstraction has 17458 states and 28953 transitions. [2021-11-12 22:17:34,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.071428571428571) internal successors, (169), 12 states have internal predecessors, (169), 8 states have call successors, (29), 6 states have call predecessors, (29), 7 states have return successors, (28), 10 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:17:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 17458 states and 28953 transitions. [2021-11-12 22:17:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:17:34,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:34,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:34,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:34,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:34,863 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1205383953, now seen corresponding path program 1 times [2021-11-12 22:17:34,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:34,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291060891] [2021-11-12 22:17:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:34,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:34,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:17:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:35,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:36,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:36,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291060891] [2021-11-12 22:17:36,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291060891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:36,447 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:36,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:17:36,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230117518] [2021-11-12 22:17:36,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:36,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:17:36,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:17:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:36,450 INFO L87 Difference]: Start difference. First operand 17458 states and 28953 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:17:38,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:40,477 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:17:47,061 INFO L93 Difference]: Finished difference Result 59751 states and 102233 transitions. [2021-11-12 22:17:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:17:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 123 [2021-11-12 22:17:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:17:47,341 INFO L225 Difference]: With dead ends: 59751 [2021-11-12 22:17:47,341 INFO L226 Difference]: Without dead ends: 42341 [2021-11-12 22:17:47,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:17:47,428 INFO L933 BasicCegarLoop]: 1725 mSDtfsCounter, 4162 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 2599 mSolverCounterSat, 1341 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7387.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4257 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 3942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.66ms SdHoareTripleChecker+Time, 1341 IncrementalHoareTripleChecker+Valid, 2599 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7920.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:17:47,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4257 Valid, 2847 Invalid, 3942 Unknown, 0 Unchecked, 20.66ms Time], IncrementalHoareTripleChecker [1341 Valid, 2599 Invalid, 2 Unknown, 0 Unchecked, 7920.78ms Time] [2021-11-12 22:17:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42341 states. [2021-11-12 22:17:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42341 to 39124. [2021-11-12 22:17:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39124 states, 26897 states have (on average 1.5719968769751274) internal successors, (42282), 28951 states have internal predecessors, (42282), 10451 states have call successors, (10451), 1230 states have call predecessors, (10451), 1775 states have return successors, (13347), 10273 states have call predecessors, (13347), 10446 states have call successors, (13347) [2021-11-12 22:17:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39124 states to 39124 states and 66080 transitions. [2021-11-12 22:17:51,452 INFO L78 Accepts]: Start accepts. Automaton has 39124 states and 66080 transitions. Word has length 123 [2021-11-12 22:17:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:17:51,453 INFO L470 AbstractCegarLoop]: Abstraction has 39124 states and 66080 transitions. [2021-11-12 22:17:51,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:17:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 39124 states and 66080 transitions. [2021-11-12 22:17:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:17:51,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:17:51,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:17:51,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:17:51,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:17:51,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:17:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:17:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash -51874528, now seen corresponding path program 1 times [2021-11-12 22:17:51,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:17:51,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359659653] [2021-11-12 22:17:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:17:51,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:17:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:17:51,688 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:17:51,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:17:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:17:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:17:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:17:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:52,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:17:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:17:53,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:17:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359659653] [2021-11-12 22:17:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359659653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:17:53,423 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:17:53,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:17:53,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013688301] [2021-11-12 22:17:53,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:17:53,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:17:53,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:17:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:17:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:17:53,428 INFO L87 Difference]: Start difference. First operand 39124 states and 66080 transitions. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:17:55,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:17:57,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:18:10,398 INFO L93 Difference]: Finished difference Result 148207 states and 259334 transitions. [2021-11-12 22:18:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:18:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) Word has length 124 [2021-11-12 22:18:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:18:11,340 INFO L225 Difference]: With dead ends: 148207 [2021-11-12 22:18:11,340 INFO L226 Difference]: Without dead ends: 109133 [2021-11-12 22:18:11,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:18:11,504 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 2920 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3334 mSolverCounterSat, 963 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7827.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3016 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.72ms SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 3334 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8428.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:18:11,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3016 Valid, 3177 Invalid, 4299 Unknown, 0 Unchecked, 21.72ms Time], IncrementalHoareTripleChecker [963 Valid, 3334 Invalid, 2 Unknown, 0 Unchecked, 8428.72ms Time] [2021-11-12 22:18:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109133 states. [2021-11-12 22:18:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109133 to 99754. [2021-11-12 22:18:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99754 states, 65222 states have (on average 1.556667995461654) internal successors, (101529), 70965 states have internal predecessors, (101529), 30402 states have call successors, (30402), 2342 states have call predecessors, (30402), 4129 states have return successors, (40952), 30736 states have call predecessors, (40952), 30397 states have call successors, (40952) [2021-11-12 22:18:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99754 states to 99754 states and 172883 transitions. [2021-11-12 22:18:21,405 INFO L78 Accepts]: Start accepts. Automaton has 99754 states and 172883 transitions. Word has length 124 [2021-11-12 22:18:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:18:21,406 INFO L470 AbstractCegarLoop]: Abstraction has 99754 states and 172883 transitions. [2021-11-12 22:18:21,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:18:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 99754 states and 172883 transitions. [2021-11-12 22:18:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:18:21,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:21,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:18:21,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-12 22:18:21,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:18:21,636 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash -410978570, now seen corresponding path program 1 times [2021-11-12 22:18:21,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:21,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483514487] [2021-11-12 22:18:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:21,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:21,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:21,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fb16da2-9662-4d9d-b7df-1b4019160c7b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:18:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:18:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:22,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:18:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:18:23,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:18:23,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483514487] [2021-11-12 22:18:23,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483514487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:18:23,403 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:18:23,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-12 22:18:23,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670561021] [2021-11-12 22:18:23,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:18:23,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:18:23,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:18:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:18:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:18:23,405 INFO L87 Difference]: Start difference. First operand 99754 states and 172883 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 8 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-12 22:18:25,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:18:27,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []