./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.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_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/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_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/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_804080c2-ddcf-4812-b306-223aa4fea196/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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:18:45,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:18:45,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:18:45,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:18:45,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:18:45,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:18:45,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:18:45,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:18:45,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:18:45,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:18:45,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:18:45,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:18:45,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:18:45,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:18:45,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:18:45,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:18:45,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:18:45,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:18:45,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:18:45,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:18:45,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:18:45,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:18:45,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:18:45,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:18:45,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:18:45,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:18:45,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:18:45,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:18:45,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:18:45,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:18:45,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:18:45,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:18:45,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:18:45,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:18:45,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:18:45,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:18:45,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:18:45,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:18:45,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:18:45,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:18:45,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:18:45,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:18:45,681 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:18:45,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:18:45,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:18:45,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:18:45,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:18:45,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:18:45,684 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:18:45,684 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:18:45,684 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:18:45,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:18:45,685 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:18:45,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:18:45,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:18:45,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:18:45,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:18:45,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:18:45,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:18:45,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:18:45,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:18:45,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:18:45,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:18:45,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:18:45,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:18:45,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:18:45,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:18:45,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:18:45,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:18:45,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:18:45,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:18:45,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:18:45,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:18:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:18:45,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:18:45,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:18:45,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:18:45,693 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:18:45,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:18:45,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:18:45,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:18:45,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:18:45,694 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_804080c2-ddcf-4812-b306-223aa4fea196/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2021-11-12 22:18:46,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:18:46,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:18:46,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:18:46,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:18:46,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:18:46,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-12 22:18:46,187 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/d39ae5781/b9f7c45ef3004ddcb00df1a7387d8502/FLAG21fd17a2e [2021-11-12 22:18:46,968 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:18:46,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-12 22:18:47,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/d39ae5781/b9f7c45ef3004ddcb00df1a7387d8502/FLAG21fd17a2e [2021-11-12 22:18:47,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/d39ae5781/b9f7c45ef3004ddcb00df1a7387d8502 [2021-11-12 22:18:47,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:18:47,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:18:47,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:47,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:18:47,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:18:47,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:47" (1/1) ... [2021-11-12 22:18:47,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb374f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:47, skipping insertion in model container [2021-11-12 22:18:47,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:47" (1/1) ... [2021-11-12 22:18:47,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:18:47,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:18:47,759 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_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-12 22:18:47,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:18:47,957 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 22:18:47,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1de4a61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:47, skipping insertion in model container [2021-11-12 22:18:47,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:47,959 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:18:47,962 INFO L158 Benchmark]: Toolchain (without parser) took 866.12ms. Allocated memory is still 100.7MB. Free memory was 63.6MB in the beginning and 60.2MB in the end (delta: 3.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:18:47,963 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 53.3MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:18:47,966 INFO L158 Benchmark]: CACSL2BoogieTranslator took 862.43ms. Allocated memory is still 100.7MB. Free memory was 63.5MB in the beginning and 60.2MB in the end (delta: 3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-12 22:18:47,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 53.3MB in the beginning and 53.3MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 862.43ms. Allocated memory is still 100.7MB. Free memory was 63.5MB in the beginning and 60.2MB in the end (delta: 3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1506]: 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_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/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_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/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_804080c2-ddcf-4812-b306-223aa4fea196/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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:18:50,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:18:50,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:18:50,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:18:50,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:18:50,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:18:50,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:18:50,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:18:50,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:18:50,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:18:50,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:18:50,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:18:50,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:18:50,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:18:50,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:18:50,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:18:50,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:18:50,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:18:50,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:18:50,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:18:50,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:18:50,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:18:50,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:18:50,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:18:50,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:18:50,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:18:50,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:18:50,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:18:50,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:18:50,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:18:50,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:18:50,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:18:50,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:18:50,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:18:50,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:18:50,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:18:50,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:18:50,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:18:50,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:18:50,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:18:50,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:18:50,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:18:50,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:18:50,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:18:50,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:18:50,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:18:50,721 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:18:50,724 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:18:50,724 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:18:50,724 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:18:50,725 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:18:50,725 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:18:50,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:18:50,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:18:50,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:18:50,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:18:50,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:18:50,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:18:50,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:18:50,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:18:50,730 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:18:50,730 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:18:50,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:18:50,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:18:50,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:18:50,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:18:50,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:18:50,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:18:50,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:18:50,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:18:50,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:18:50,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:18:50,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:18:50,733 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:18:50,734 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:18:50,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:18:50,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:18:50,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:18:50,735 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_804080c2-ddcf-4812-b306-223aa4fea196/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2021-11-12 22:18:51,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:18:51,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:18:51,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:18:51,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:18:51,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:18:51,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-12 22:18:51,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/8f0932c08/feef979fd2134085843be5638ab3e39f/FLAGeefa703fd [2021-11-12 22:18:52,056 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:18:52,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2021-11-12 22:18:52,094 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/8f0932c08/feef979fd2134085843be5638ab3e39f/FLAGeefa703fd [2021-11-12 22:18:52,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/data/8f0932c08/feef979fd2134085843be5638ab3e39f [2021-11-12 22:18:52,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:18:52,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:18:52,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:52,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:18:52,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:18:52,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:52" (1/1) ... [2021-11-12 22:18:52,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0fa316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:52, skipping insertion in model container [2021-11-12 22:18:52,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:18:52" (1/1) ... [2021-11-12 22:18:52,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:18:52,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:18:52,993 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_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-12 22:18:53,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:18:53,127 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:18:53,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:18:53,256 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_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-12 22:18:53,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:18:53,344 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:18:53,409 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_804080c2-ddcf-4812-b306-223aa4fea196/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2021-11-12 22:18:53,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:18:53,499 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:18:53,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53 WrapperNode [2021-11-12 22:18:53,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:18:53,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:18:53,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:18:53,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:18:53,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:18:53,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:18:53,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:18:53,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:18:53,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:18:53,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:18:53,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:18:53,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:18:53,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (1/1) ... [2021-11-12 22:18:53,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:18:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:18:53,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:18:53,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:18:53,970 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-12 22:18:53,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-12 22:18:53,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:18:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 22:18:53,973 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 22:18:53,973 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 22:18:53,973 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 22:18:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 22:18:53,974 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 22:18:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 22:18:53,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 22:18:53,974 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 22:18:53,974 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 22:18:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 22:18:53,975 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 22:18:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 22:18:53,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 22:18:53,975 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 22:18:53,976 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 22:18:53,976 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 22:18:53,976 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 22:18:53,977 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 22:18:53,977 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 22:18:53,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:18:53,978 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-12 22:18:53,978 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-12 22:18:53,978 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 22:18:53,978 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 22:18:53,978 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-12 22:18:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-12 22:18:53,979 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 22:18:53,979 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 22:18:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 22:18:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 22:18:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 22:18:53,980 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 22:18:53,980 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 22:18:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 22:18:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 22:18:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 22:18:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 22:18:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 22:18:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 22:18:53,982 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 22:18:53,982 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 22:18:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 22:18:53,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:18:53,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:18:53,984 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 22:18:53,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 22:18:58,141 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:18:58,142 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:18:58,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:18:58 BoogieIcfgContainer [2021-11-12 22:18:58,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:18:58,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:18:58,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:18:58,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:18:58,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:18:52" (1/3) ... [2021-11-12 22:18:58,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48689c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:18:58, skipping insertion in model container [2021-11-12 22:18:58,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:18:53" (2/3) ... [2021-11-12 22:18:58,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48689c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:18:58, skipping insertion in model container [2021-11-12 22:18:58,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:18:58" (3/3) ... [2021-11-12 22:18:58,160 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2021-11-12 22:18:58,166 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:18:58,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:18:58,252 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:18:58,265 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 22:18:58,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:18:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 22:18:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 22:18:58,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:18:58,355 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] [2021-11-12 22:18:58,356 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:18:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:18:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1392442594, now seen corresponding path program 1 times [2021-11-12 22:18:58,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:18:58,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535858321] [2021-11-12 22:18:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:18:58,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:18:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:18:58,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:18:58,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:18:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:18:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:18:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:18:59,608 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 22:18:59,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:00,130 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 22:19:00,131 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:00,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535858321] [2021-11-12 22:19:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535858321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:00,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290638255] [2021-11-12 22:19:00,137 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:00,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:00,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:00,189 INFO L87 Difference]: Start difference. First operand has 546 states, 423 states have (on average 1.6926713947990544) internal successors, (716), 441 states have internal predecessors, (716), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:00,656 INFO L93 Difference]: Finished difference Result 1095 states and 1845 transitions. [2021-11-12 22:19:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:19:00,660 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 85 [2021-11-12 22:19:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:00,679 INFO L225 Difference]: With dead ends: 1095 [2021-11-12 22:19:00,679 INFO L226 Difference]: Without dead ends: 557 [2021-11-12 22:19:00,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 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 22:19:00,692 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 118 mSDsluCounter, 6089 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6983 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.40ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:00,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6983 Invalid, 111 Unknown, 0 Unchecked, 41.40ms Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 230.00ms Time] [2021-11-12 22:19:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-12 22:19:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 549. [2021-11-12 22:19:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 426 states have (on average 1.6830985915492958) internal successors, (717), 444 states have internal predecessors, (717), 99 states have call successors, (99), 23 states have call predecessors, (99), 23 states have return successors, (98), 94 states have call predecessors, (98), 96 states have call successors, (98) [2021-11-12 22:19:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 914 transitions. [2021-11-12 22:19:00,804 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 914 transitions. Word has length 85 [2021-11-12 22:19:00,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:00,806 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 914 transitions. [2021-11-12 22:19:00,807 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 914 transitions. [2021-11-12 22:19:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 22:19:00,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:00,827 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] [2021-11-12 22:19:00,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:01,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:01,053 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1014456678, now seen corresponding path program 1 times [2021-11-12 22:19:01,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:01,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225250224] [2021-11-12 22:19:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:01,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:01,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:01,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:19:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:02,123 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 22:19:02,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:02,629 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 22:19:02,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:02,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225250224] [2021-11-12 22:19:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225250224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:02,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:02,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532154964] [2021-11-12 22:19:02,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:02,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:02,640 INFO L87 Difference]: Start difference. First operand 549 states and 914 transitions. Second operand has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:03,037 INFO L93 Difference]: Finished difference Result 1103 states and 1846 transitions. [2021-11-12 22:19:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:19:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 86 [2021-11-12 22:19:03,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:03,049 INFO L225 Difference]: With dead ends: 1103 [2021-11-12 22:19:03,050 INFO L226 Difference]: Without dead ends: 570 [2021-11-12 22:19:03,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 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 22:19:03,085 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 105 mSDsluCounter, 6067 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6963 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.10ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:03,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 6963 Invalid, 119 Unknown, 0 Unchecked, 19.10ms Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 254.70ms Time] [2021-11-12 22:19:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-12 22:19:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-11-12 22:19:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 436 states have (on average 1.6788990825688073) internal successors, (732), 456 states have internal predecessors, (732), 100 states have call successors, (100), 23 states have call predecessors, (100), 25 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-12 22:19:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 933 transitions. [2021-11-12 22:19:03,174 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 933 transitions. Word has length 86 [2021-11-12 22:19:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:03,175 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 933 transitions. [2021-11-12 22:19:03,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 933 transitions. [2021-11-12 22:19:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-12 22:19:03,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:03,184 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] [2021-11-12 22:19:03,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:03,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:03,408 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -610510714, now seen corresponding path program 1 times [2021-11-12 22:19:03,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:03,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791082688] [2021-11-12 22:19:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:03,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:03,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:03,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:03,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:19:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:04,325 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 22:19:04,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:04,826 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 22:19:04,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:04,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791082688] [2021-11-12 22:19:04,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791082688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:04,827 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:04,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 22:19:04,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205441450] [2021-11-12 22:19:04,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:04,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:19:04,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:19:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:19:04,830 INFO L87 Difference]: Start difference. First operand 562 states and 933 transitions. Second operand has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:05,154 INFO L93 Difference]: Finished difference Result 1129 states and 1885 transitions. [2021-11-12 22:19:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:19:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 87 [2021-11-12 22:19:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:05,163 INFO L225 Difference]: With dead ends: 1129 [2021-11-12 22:19:05,164 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 22:19:05,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 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 22:19:05,170 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 184 mSDsluCounter, 5328 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 6223 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.66ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:05,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 6223 Invalid, 124 Unknown, 0 Unchecked, 17.66ms Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 225.60ms Time] [2021-11-12 22:19:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 22:19:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 575. [2021-11-12 22:19:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 446 states have (on average 1.6748878923766817) internal successors, (747), 468 states have internal predecessors, (747), 101 states have call successors, (101), 23 states have call predecessors, (101), 27 states have return successors, (104), 96 states have call predecessors, (104), 98 states have call successors, (104) [2021-11-12 22:19:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 952 transitions. [2021-11-12 22:19:05,215 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 952 transitions. Word has length 87 [2021-11-12 22:19:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:05,216 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 952 transitions. [2021-11-12 22:19:05,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 952 transitions. [2021-11-12 22:19:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:19:05,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:05,222 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] [2021-11-12 22:19:05,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:05,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:05,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1878847093, now seen corresponding path program 1 times [2021-11-12 22:19:05,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:05,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298350222] [2021-11-12 22:19:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:05,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:05,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:05,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:05,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:19:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:06,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:19:06,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:06,283 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 22:19:06,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:06,730 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 22:19:06,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:06,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298350222] [2021-11-12 22:19:06,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298350222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:06,735 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:06,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 22:19:06,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961714050] [2021-11-12 22:19:06,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:06,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:06,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:06,739 INFO L87 Difference]: Start difference. First operand 575 states and 952 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:19:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:06,972 INFO L93 Difference]: Finished difference Result 1149 states and 1915 transitions. [2021-11-12 22:19:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:06,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-12 22:19:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:06,984 INFO L225 Difference]: With dead ends: 1149 [2021-11-12 22:19:06,984 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 22:19:06,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 168 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 22:19:07,002 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 150 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 5166 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.64ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:07,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 5166 Invalid, 81 Unknown, 0 Unchecked, 14.64ms Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 148.31ms Time] [2021-11-12 22:19:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 22:19:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 588. [2021-11-12 22:19:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 456 states have (on average 1.6710526315789473) internal successors, (762), 480 states have internal predecessors, (762), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-12 22:19:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 974 transitions. [2021-11-12 22:19:07,054 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 974 transitions. Word has length 88 [2021-11-12 22:19:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:07,056 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 974 transitions. [2021-11-12 22:19:07,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 22:19:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 974 transitions. [2021-11-12 22:19:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:19:07,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:07,063 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] [2021-11-12 22:19:07,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:07,286 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 377758762, now seen corresponding path program 1 times [2021-11-12 22:19:07,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:07,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770862627] [2021-11-12 22:19:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:07,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:07,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:07,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:19:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:08,149 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 22:19:08,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:08,728 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 22:19:08,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:08,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770862627] [2021-11-12 22:19:08,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770862627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:08,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:08,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:08,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898209931] [2021-11-12 22:19:08,729 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:08,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:08,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:08,738 INFO L87 Difference]: Start difference. First operand 588 states and 974 transitions. Second operand has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:09,251 INFO L93 Difference]: Finished difference Result 1172 states and 1951 transitions. [2021-11-12 22:19:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:19:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 89 [2021-11-12 22:19:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:09,259 INFO L225 Difference]: With dead ends: 1172 [2021-11-12 22:19:09,260 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 22:19:09,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:19:09,267 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 178 mSDsluCounter, 7753 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 8627 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.57ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 361.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:09,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 8627 Invalid, 225 Unknown, 0 Unchecked, 23.57ms Time], IncrementalHoareTripleChecker [6 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 361.86ms Time] [2021-11-12 22:19:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 22:19:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 584. [2021-11-12 22:19:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 452 states have (on average 1.6615044247787611) internal successors, (751), 476 states have internal predecessors, (751), 102 states have call successors, (102), 23 states have call predecessors, (102), 29 states have return successors, (110), 97 states have call predecessors, (110), 99 states have call successors, (110) [2021-11-12 22:19:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 963 transitions. [2021-11-12 22:19:09,326 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 963 transitions. Word has length 89 [2021-11-12 22:19:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:09,326 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 963 transitions. [2021-11-12 22:19:09,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 963 transitions. [2021-11-12 22:19:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:19:09,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:09,332 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] [2021-11-12 22:19:09,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:09,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:09,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash 346977178, now seen corresponding path program 1 times [2021-11-12 22:19:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:09,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170970320] [2021-11-12 22:19:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:09,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:09,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:09,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:09,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:19:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:10,341 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 22:19:10,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:10,634 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 22:19:10,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:10,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170970320] [2021-11-12 22:19:10,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170970320] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:10,635 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:10,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:19:10,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848061800] [2021-11-12 22:19:10,636 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:10,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:10,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:19:10,637 INFO L87 Difference]: Start difference. First operand 584 states and 963 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:19:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:10,725 INFO L93 Difference]: Finished difference Result 1144 states and 1892 transitions. [2021-11-12 22:19:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:19:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-12 22:19:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:10,731 INFO L225 Difference]: With dead ends: 1144 [2021-11-12 22:19:10,732 INFO L226 Difference]: Without dead ends: 507 [2021-11-12 22:19:10,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:10,738 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 26 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:10,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 2642 Invalid, 19 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 30.51ms Time] [2021-11-12 22:19:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-12 22:19:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-12 22:19:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6459948320413436) internal successors, (637), 403 states have internal predecessors, (637), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:19:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 830 transitions. [2021-11-12 22:19:10,768 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 830 transitions. Word has length 89 [2021-11-12 22:19:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:10,768 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 830 transitions. [2021-11-12 22:19:10,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:19:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 830 transitions. [2021-11-12 22:19:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:19:10,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:10,773 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] [2021-11-12 22:19:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:10,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:10,992 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1176382102, now seen corresponding path program 1 times [2021-11-12 22:19:10,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:10,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713786975] [2021-11-12 22:19:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:10,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:10,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:10,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:11,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:19:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:11,820 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 22:19:11,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:12,480 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 22:19:12,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:12,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713786975] [2021-11-12 22:19:12,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713786975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:12,481 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:12,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:12,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316390082] [2021-11-12 22:19:12,481 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:12,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:12,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:12,483 INFO L87 Difference]: Start difference. First operand 507 states and 830 transitions. Second operand has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:12,743 INFO L93 Difference]: Finished difference Result 1001 states and 1648 transitions. [2021-11-12 22:19:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:12,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 90 [2021-11-12 22:19:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:12,754 INFO L225 Difference]: With dead ends: 1001 [2021-11-12 22:19:12,754 INFO L226 Difference]: Without dead ends: 507 [2021-11-12 22:19:12,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:19:12,763 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 50 mSDsluCounter, 6462 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 7275 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:12,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 7275 Invalid, 124 Unknown, 0 Unchecked, 13.86ms Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 160.53ms Time] [2021-11-12 22:19:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-12 22:19:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-12 22:19:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6434108527131783) internal successors, (636), 403 states have internal predecessors, (636), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:19:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 829 transitions. [2021-11-12 22:19:12,793 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 829 transitions. Word has length 90 [2021-11-12 22:19:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:12,793 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 829 transitions. [2021-11-12 22:19:12,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 829 transitions. [2021-11-12 22:19:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-12 22:19:12,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:12,798 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] [2021-11-12 22:19:12,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:13,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:13,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1042184495, now seen corresponding path program 1 times [2021-11-12 22:19:13,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:13,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070790088] [2021-11-12 22:19:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:13,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:13,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:13,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:19:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:13,874 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 22:19:13,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:14,404 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 22:19:14,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:14,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070790088] [2021-11-12 22:19:14,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070790088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:14,405 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:14,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:14,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171627393] [2021-11-12 22:19:14,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:14,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:14,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:14,407 INFO L87 Difference]: Start difference. First operand 507 states and 829 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:14,658 INFO L93 Difference]: Finished difference Result 1001 states and 1646 transitions. [2021-11-12 22:19:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:14,660 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 91 [2021-11-12 22:19:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:14,665 INFO L225 Difference]: With dead ends: 1001 [2021-11-12 22:19:14,666 INFO L226 Difference]: Without dead ends: 507 [2021-11-12 22:19:14,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:19:14,671 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 45 mSDsluCounter, 8082 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8895 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8895 Invalid, 142 Unknown, 0 Unchecked, 18.65ms Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 151.02ms Time] [2021-11-12 22:19:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-12 22:19:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-12 22:19:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6408268733850129) internal successors, (635), 403 states have internal predecessors, (635), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:19:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 828 transitions. [2021-11-12 22:19:14,700 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 828 transitions. Word has length 91 [2021-11-12 22:19:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:14,701 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 828 transitions. [2021-11-12 22:19:14,701 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, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 828 transitions. [2021-11-12 22:19:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-12 22:19:14,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:14,705 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] [2021-11-12 22:19:14,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:14,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -44401905, now seen corresponding path program 1 times [2021-11-12 22:19:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:14,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20972718] [2021-11-12 22:19:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:14,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:14,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:14,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:14,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:19:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:19:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:15,732 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 22:19:15,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:16,345 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 22:19:16,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:16,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20972718] [2021-11-12 22:19:16,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20972718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:16,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:16,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 22:19:16,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498887909] [2021-11-12 22:19:16,347 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:16,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:19:16,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:19:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:19:16,349 INFO L87 Difference]: Start difference. First operand 507 states and 828 transitions. Second operand has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:16,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:16,527 INFO L93 Difference]: Finished difference Result 1001 states and 1644 transitions. [2021-11-12 22:19:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 92 [2021-11-12 22:19:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:16,536 INFO L225 Difference]: With dead ends: 1001 [2021-11-12 22:19:16,537 INFO L226 Difference]: Without dead ends: 507 [2021-11-12 22:19:16,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:19:16,542 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 64 mSDsluCounter, 4853 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 5666 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.01ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:16,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 5666 Invalid, 94 Unknown, 0 Unchecked, 11.43ms Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 99.01ms Time] [2021-11-12 22:19:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-12 22:19:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-12 22:19:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 387 states have (on average 1.6382428940568476) internal successors, (634), 403 states have internal predecessors, (634), 98 states have call successors, (98), 23 states have call predecessors, (98), 21 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2021-11-12 22:19:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 827 transitions. [2021-11-12 22:19:16,591 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 827 transitions. Word has length 92 [2021-11-12 22:19:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 827 transitions. [2021-11-12 22:19:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 states have internal predecessors, (97), 4 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:19:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 827 transitions. [2021-11-12 22:19:16,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:19:16,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:16,594 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] [2021-11-12 22:19:16,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:16,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,802 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -511516108, now seen corresponding path program 1 times [2021-11-12 22:19:16,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:16,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529813350] [2021-11-12 22:19:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:16,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:16,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:16,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:19:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:17,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:19:17,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:17,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529813350] [2021-11-12 22:19:17,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529813350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:19:17,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:19:17,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:19:17,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573149700] [2021-11-12 22:19:17,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:19:17,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:19:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:19:17,968 INFO L87 Difference]: Start difference. First operand 507 states and 827 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:20,004 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 22:19:22,009 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 22:19:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:23,259 INFO L93 Difference]: Finished difference Result 1488 states and 2465 transitions. [2021-11-12 22:19:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:19:23,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 93 [2021-11-12 22:19:23,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:23,273 INFO L225 Difference]: With dead ends: 1488 [2021-11-12 22:19:23,273 INFO L226 Difference]: Without dead ends: 999 [2021-11-12 22:19:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:19:23,281 INFO L933 BasicCegarLoop]: 937 mSDtfsCounter, 813 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 130 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4970.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 4410 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.82ms SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5132.36ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:23,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 4410 Invalid, 467 Unknown, 0 Unchecked, 26.82ms Time], IncrementalHoareTripleChecker [130 Valid, 335 Invalid, 2 Unknown, 0 Unchecked, 5132.36ms Time] [2021-11-12 22:19:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-11-12 22:19:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 990. [2021-11-12 22:19:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 759 states have (on average 1.6416337285902503) internal successors, (1246), 790 states have internal predecessors, (1246), 188 states have call successors, (188), 42 states have call predecessors, (188), 42 states have return successors, (199), 183 states have call predecessors, (199), 184 states have call successors, (199) [2021-11-12 22:19:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1633 transitions. [2021-11-12 22:19:23,347 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1633 transitions. Word has length 93 [2021-11-12 22:19:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:23,349 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1633 transitions. [2021-11-12 22:19:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:19:23,350 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1633 transitions. [2021-11-12 22:19:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-12 22:19:23,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:23,353 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] [2021-11-12 22:19:23,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:23,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:23,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1915141428, now seen corresponding path program 1 times [2021-11-12 22:19:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:23,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205221383] [2021-11-12 22:19:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:23,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:23,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:23,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:19:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:24,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:24,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:24,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:24,656 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 22:19:24,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:24,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205221383] [2021-11-12 22:19:24,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205221383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:24,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:24,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:19:24,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355052502] [2021-11-12 22:19:24,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:19:24,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:19:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:19:24,660 INFO L87 Difference]: Start difference. First operand 990 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:19:26,684 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 22:19:28,691 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 22:19:31,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:31,673 INFO L93 Difference]: Finished difference Result 3664 states and 6165 transitions. [2021-11-12 22:19:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:19:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 93 [2021-11-12 22:19:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:31,720 INFO L225 Difference]: With dead ends: 3664 [2021-11-12 22:19:31,720 INFO L226 Difference]: Without dead ends: 2692 [2021-11-12 22:19:31,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:19:31,737 INFO L933 BasicCegarLoop]: 1013 mSDtfsCounter, 2102 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 534 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6227.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 5769 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.10ms SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6642.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:31,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2164 Valid, 5769 Invalid, 1482 Unknown, 0 Unchecked, 31.10ms Time], IncrementalHoareTripleChecker [534 Valid, 946 Invalid, 2 Unknown, 0 Unchecked, 6642.55ms Time] [2021-11-12 22:19:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-12 22:19:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2362. [2021-11-12 22:19:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 1804 states have (on average 1.6092017738359201) internal successors, (2903), 1882 states have internal predecessors, (2903), 452 states have call successors, (452), 102 states have call predecessors, (452), 105 states have return successors, (502), 439 states have call predecessors, (502), 445 states have call successors, (502) [2021-11-12 22:19:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3857 transitions. [2021-11-12 22:19:31,913 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3857 transitions. Word has length 93 [2021-11-12 22:19:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:31,914 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3857 transitions. [2021-11-12 22:19:31,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 6 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-12 22:19:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3857 transitions. [2021-11-12 22:19:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:19:31,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:31,919 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] [2021-11-12 22:19:31,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:32,136 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -775152523, now seen corresponding path program 1 times [2021-11-12 22:19:32,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:32,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098237151] [2021-11-12 22:19:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:32,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:32,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:19:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:33,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:33,333 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 22:19:33,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:33,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098237151] [2021-11-12 22:19:33,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098237151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:33,334 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:33,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:19:33,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822737819] [2021-11-12 22:19:33,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:33,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:33,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:33,337 INFO L87 Difference]: Start difference. First operand 2362 states and 3857 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:19:35,367 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 22:19:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:38,362 INFO L93 Difference]: Finished difference Result 8564 states and 14686 transitions. [2021-11-12 22:19:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 101 [2021-11-12 22:19:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:38,426 INFO L225 Difference]: With dead ends: 8564 [2021-11-12 22:19:38,426 INFO L226 Difference]: Without dead ends: 6220 [2021-11-12 22:19:38,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:38,452 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 1101 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4163.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 6398 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 66.12ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4488.73ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:38,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 6398 Invalid, 1047 Unknown, 0 Unchecked, 66.12ms Time], IncrementalHoareTripleChecker [95 Valid, 951 Invalid, 1 Unknown, 0 Unchecked, 4488.73ms Time] [2021-11-12 22:19:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2021-11-12 22:19:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 4648. [2021-11-12 22:19:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3555 states have (on average 1.6042194092827005) internal successors, (5703), 3714 states have internal predecessors, (5703), 874 states have call successors, (874), 201 states have call predecessors, (874), 218 states have return successors, (1138), 856 states have call predecessors, (1138), 862 states have call successors, (1138) [2021-11-12 22:19:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 7715 transitions. [2021-11-12 22:19:38,910 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 7715 transitions. Word has length 101 [2021-11-12 22:19:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 4648 states and 7715 transitions. [2021-11-12 22:19:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-12 22:19:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 7715 transitions. [2021-11-12 22:19:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-12 22:19:38,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:38,915 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] [2021-11-12 22:19:38,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:39,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:39,137 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash -330901337, now seen corresponding path program 1 times [2021-11-12 22:19:39,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:39,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078551546] [2021-11-12 22:19:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:39,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:39,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:39,139 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:39,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:19:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:39,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:19:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:40,164 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 22:19:40,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:40,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078551546] [2021-11-12 22:19:40,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078551546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:40,165 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:40,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:19:40,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259476738] [2021-11-12 22:19:40,166 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:40,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:40,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:19:40,170 INFO L87 Difference]: Start difference. First operand 4648 states and 7715 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:19:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:40,644 INFO L93 Difference]: Finished difference Result 9308 states and 15652 transitions. [2021-11-12 22:19:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:40,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 102 [2021-11-12 22:19:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:40,695 INFO L225 Difference]: With dead ends: 9308 [2021-11-12 22:19:40,696 INFO L226 Difference]: Without dead ends: 4678 [2021-11-12 22:19:40,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:40,739 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 19 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:40,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 2394 Invalid, 82 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [18 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 114.99ms Time] [2021-11-12 22:19:40,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-11-12 22:19:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4668. [2021-11-12 22:19:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 3570 states have (on average 1.600280112044818) internal successors, (5713), 3729 states have internal predecessors, (5713), 874 states have call successors, (874), 211 states have call predecessors, (874), 223 states have return successors, (1111), 851 states have call predecessors, (1111), 862 states have call successors, (1111) [2021-11-12 22:19:41,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 7698 transitions. [2021-11-12 22:19:41,141 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 7698 transitions. Word has length 102 [2021-11-12 22:19:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:41,142 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 7698 transitions. [2021-11-12 22:19:41,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-12 22:19:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 7698 transitions. [2021-11-12 22:19:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 22:19:41,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:41,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:41,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-12 22:19:41,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:41,364 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -223809895, now seen corresponding path program 1 times [2021-11-12 22:19:41,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:41,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362835462] [2021-11-12 22:19:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:41,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:41,367 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:41,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:19:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:19:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:19:42,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:42,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362835462] [2021-11-12 22:19:42,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362835462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:42,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:42,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:19:42,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727634895] [2021-11-12 22:19:42,558 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:42,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:42,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:42,561 INFO L87 Difference]: Start difference. First operand 4668 states and 7698 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:19:44,589 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 22:19:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:47,548 INFO L93 Difference]: Finished difference Result 17140 states and 30165 transitions. [2021-11-12 22:19:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:19:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 110 [2021-11-12 22:19:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:47,735 INFO L225 Difference]: With dead ends: 17140 [2021-11-12 22:19:47,735 INFO L226 Difference]: Without dead ends: 12490 [2021-11-12 22:19:47,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:19:47,774 INFO L933 BasicCegarLoop]: 1252 mSDtfsCounter, 1065 mSDsluCounter, 5158 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3958.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.62ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4270.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:47,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 6410 Invalid, 1036 Unknown, 0 Unchecked, 27.62ms Time], IncrementalHoareTripleChecker [87 Valid, 948 Invalid, 1 Unknown, 0 Unchecked, 4270.32ms Time] [2021-11-12 22:19:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12490 states. [2021-11-12 22:19:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12490 to 9310. [2021-11-12 22:19:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9310 states, 7122 states have (on average 1.5954787980904241) internal successors, (11363), 7448 states have internal predecessors, (11363), 1723 states have call successors, (1723), 419 states have call predecessors, (1723), 464 states have return successors, (2600), 1690 states have call predecessors, (2600), 1701 states have call successors, (2600) [2021-11-12 22:19:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9310 states to 9310 states and 15686 transitions. [2021-11-12 22:19:48,737 INFO L78 Accepts]: Start accepts. Automaton has 9310 states and 15686 transitions. Word has length 110 [2021-11-12 22:19:48,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:48,737 INFO L470 AbstractCegarLoop]: Abstraction has 9310 states and 15686 transitions. [2021-11-12 22:19:48,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-12 22:19:48,738 INFO L276 IsEmpty]: Start isEmpty. Operand 9310 states and 15686 transitions. [2021-11-12 22:19:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:19:48,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:48,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:48,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:19:48,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:48,968 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:48,968 INFO L85 PathProgramCache]: Analyzing trace with hash -602606661, now seen corresponding path program 1 times [2021-11-12 22:19:48,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:48,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347947219] [2021-11-12 22:19:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:48,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:48,970 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:48,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:19:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:19:49,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:19:49,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:19:50,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:50,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347947219] [2021-11-12 22:19:50,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347947219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:50,007 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:50,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:19:50,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330697730] [2021-11-12 22:19:50,007 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:50,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:19:50,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:19:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:19:50,009 INFO L87 Difference]: Start difference. First operand 9310 states and 15686 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:19:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:19:50,923 INFO L93 Difference]: Finished difference Result 18722 states and 32059 transitions. [2021-11-12 22:19:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:19:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 111 [2021-11-12 22:19:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:19:51,099 INFO L225 Difference]: With dead ends: 18722 [2021-11-12 22:19:51,100 INFO L226 Difference]: Without dead ends: 9430 [2021-11-12 22:19:51,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:19:51,220 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 21 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3185 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.05ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:19:51,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3185 Invalid, 86 Unknown, 0 Unchecked, 9.05ms Time], IncrementalHoareTripleChecker [11 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 114.08ms Time] [2021-11-12 22:19:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9430 states. [2021-11-12 22:19:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9430 to 9410. [2021-11-12 22:19:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9410 states, 7212 states have (on average 1.5894342762063227) internal successors, (11463), 7518 states have internal predecessors, (11463), 1723 states have call successors, (1723), 459 states have call predecessors, (1723), 474 states have return successors, (2558), 1680 states have call predecessors, (2558), 1701 states have call successors, (2558) [2021-11-12 22:19:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9410 states to 9410 states and 15744 transitions. [2021-11-12 22:19:52,112 INFO L78 Accepts]: Start accepts. Automaton has 9410 states and 15744 transitions. Word has length 111 [2021-11-12 22:19:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:19:52,115 INFO L470 AbstractCegarLoop]: Abstraction has 9410 states and 15744 transitions. [2021-11-12 22:19:52,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:19:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9410 states and 15744 transitions. [2021-11-12 22:19:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-12 22:19:52,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:19:52,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:19:52,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:19:52,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:19:52,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:19:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:19:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash 815865513, now seen corresponding path program 1 times [2021-11-12 22:19:52,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:19:52,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863779401] [2021-11-12 22:19:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:19:52,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:19:52,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:19:52,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:19:52,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:19:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:19:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:19:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:19:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:19:53,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:19:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:19:53,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:19:53,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863779401] [2021-11-12 22:19:53,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863779401] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:19:53,555 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:19:53,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:19:53,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937394782] [2021-11-12 22:19:53,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:19:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:19:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:19:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:19:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:19:53,560 INFO L87 Difference]: Start difference. First operand 9410 states and 15744 transitions. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 22:19:55,595 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 22:19:57,602 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 22:20:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:00,374 INFO L93 Difference]: Finished difference Result 34470 states and 62898 transitions. [2021-11-12 22:20:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:20:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 120 [2021-11-12 22:20:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:00,620 INFO L225 Difference]: With dead ends: 34470 [2021-11-12 22:20:00,621 INFO L226 Difference]: Without dead ends: 25078 [2021-11-12 22:20:00,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:20:00,749 INFO L933 BasicCegarLoop]: 1271 mSDtfsCounter, 1054 mSDsluCounter, 4307 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 86 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5160.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 5578 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.26ms SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5372.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:00,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 5578 Invalid, 636 Unknown, 0 Unchecked, 17.26ms Time], IncrementalHoareTripleChecker [86 Valid, 548 Invalid, 2 Unknown, 0 Unchecked, 5372.30ms Time] [2021-11-12 22:20:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25078 states. [2021-11-12 22:20:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25078 to 18874. [2021-11-12 22:20:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18874 states, 14461 states have (on average 1.584261116105387) internal successors, (22910), 15091 states have internal predecessors, (22910), 3426 states have call successors, (3426), 915 states have call predecessors, (3426), 986 states have return successors, (6151), 3363 states have call predecessors, (6151), 3384 states have call successors, (6151) [2021-11-12 22:20:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18874 states to 18874 states and 32487 transitions. [2021-11-12 22:20:02,958 INFO L78 Accepts]: Start accepts. Automaton has 18874 states and 32487 transitions. Word has length 120 [2021-11-12 22:20:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:02,958 INFO L470 AbstractCegarLoop]: Abstraction has 18874 states and 32487 transitions. [2021-11-12 22:20:02,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 6 states have internal predecessors, (134), 3 states have call successors, (29), 3 states have call predecessors, (29), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-12 22:20:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 18874 states and 32487 transitions. [2021-11-12 22:20:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:20:02,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:02,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:02,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:03,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:03,187 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1379102307, now seen corresponding path program 1 times [2021-11-12 22:20:03,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:03,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456741583] [2021-11-12 22:20:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:03,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:03,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:03,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:20:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:20:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:20:03,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:20:04,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:04,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456741583] [2021-11-12 22:20:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456741583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:04,252 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:04,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-12 22:20:04,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818232455] [2021-11-12 22:20:04,253 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:04,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:20:04,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:20:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:20:04,257 INFO L87 Difference]: Start difference. First operand 18874 states and 32487 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:20:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:05,684 INFO L93 Difference]: Finished difference Result 37970 states and 66885 transitions. [2021-11-12 22:20:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 121 [2021-11-12 22:20:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:05,838 INFO L225 Difference]: With dead ends: 37970 [2021-11-12 22:20:05,838 INFO L226 Difference]: Without dead ends: 19114 [2021-11-12 22:20:06,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:20:06,244 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 34 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:06,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1599 Invalid, 68 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 92.58ms Time] [2021-11-12 22:20:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19114 states. [2021-11-12 22:20:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19114 to 19074. [2021-11-12 22:20:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19074 states, 14641 states have (on average 1.5784440953486785) internal successors, (23110), 15271 states have internal predecessors, (23110), 3426 states have call successors, (3426), 955 states have call predecessors, (3426), 1006 states have return successors, (6091), 3343 states have call predecessors, (6091), 3384 states have call successors, (6091) [2021-11-12 22:20:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19074 states to 19074 states and 32627 transitions. [2021-11-12 22:20:07,960 INFO L78 Accepts]: Start accepts. Automaton has 19074 states and 32627 transitions. Word has length 121 [2021-11-12 22:20:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:07,961 INFO L470 AbstractCegarLoop]: Abstraction has 19074 states and 32627 transitions. [2021-11-12 22:20:07,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:20:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 19074 states and 32627 transitions. [2021-11-12 22:20:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:20:07,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:07,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:07,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-12 22:20:08,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:08,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1933314565, now seen corresponding path program 1 times [2021-11-12 22:20:08,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:08,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153993409] [2021-11-12 22:20:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:08,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:08,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:08,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:20:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:20:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:20:09,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 22:20:09,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:09,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153993409] [2021-11-12 22:20:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153993409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:09,474 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:09,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 22:20:09,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915502518] [2021-11-12 22:20:09,475 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:09,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:20:09,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:20:09,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:20:09,477 INFO L87 Difference]: Start difference. First operand 19074 states and 32627 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 22:20:11,503 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 22:20:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:16,852 INFO L93 Difference]: Finished difference Result 69522 states and 133772 transitions. [2021-11-12 22:20:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:20:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 131 [2021-11-12 22:20:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:17,271 INFO L225 Difference]: With dead ends: 69522 [2021-11-12 22:20:17,272 INFO L226 Difference]: Without dead ends: 50466 [2021-11-12 22:20:17,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:20:17,761 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 1112 mSDsluCounter, 4535 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 139 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3609.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 5645 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.34ms SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3941.52ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1172 Valid, 5645 Invalid, 903 Unknown, 0 Unchecked, 19.34ms Time], IncrementalHoareTripleChecker [139 Valid, 763 Invalid, 1 Unknown, 0 Unchecked, 3941.52ms Time] [2021-11-12 22:20:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50466 states. [2021-11-12 22:20:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50466 to 38342. [2021-11-12 22:20:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38342 states, 29414 states have (on average 1.5734344189841571) internal successors, (46281), 30712 states have internal predecessors, (46281), 6837 states have call successors, (6837), 1907 states have call predecessors, (6837), 2090 states have return successors, (15080), 6714 states have call predecessors, (15080), 6755 states have call successors, (15080) [2021-11-12 22:20:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38342 states to 38342 states and 68198 transitions. [2021-11-12 22:20:21,870 INFO L78 Accepts]: Start accepts. Automaton has 38342 states and 68198 transitions. Word has length 131 [2021-11-12 22:20:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:21,870 INFO L470 AbstractCegarLoop]: Abstraction has 38342 states and 68198 transitions. [2021-11-12 22:20:21,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 22:20:21,871 INFO L276 IsEmpty]: Start isEmpty. Operand 38342 states and 68198 transitions. [2021-11-12 22:20:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 22:20:21,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:21,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:21,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:22,087 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1148509977, now seen corresponding path program 1 times [2021-11-12 22:20:22,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:22,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406569877] [2021-11-12 22:20:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:22,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:22,091 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:22,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:20:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:20:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:20:23,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:20:23,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:23,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406569877] [2021-11-12 22:20:23,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406569877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:23,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:20:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091972226] [2021-11-12 22:20:23,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:23,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:20:23,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:20:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:20:23,531 INFO L87 Difference]: Start difference. First operand 38342 states and 68198 transitions. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:20:25,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:27,571 WARN L515 Checker$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 22:20:34,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:34,546 INFO L93 Difference]: Finished difference Result 84660 states and 158793 transitions. [2021-11-12 22:20:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:20:34,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 132 [2021-11-12 22:20:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:34,989 INFO L225 Difference]: With dead ends: 84660 [2021-11-12 22:20:34,990 INFO L226 Difference]: Without dead ends: 46336 [2021-11-12 22:20:35,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:20:35,673 INFO L933 BasicCegarLoop]: 1234 mSDtfsCounter, 1946 mSDsluCounter, 3530 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 184 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6866.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 4764 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.22ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7319.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:35,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2035 Valid, 4764 Invalid, 2188 Unknown, 0 Unchecked, 23.22ms Time], IncrementalHoareTripleChecker [184 Valid, 2002 Invalid, 2 Unknown, 0 Unchecked, 7319.76ms Time] [2021-11-12 22:20:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46336 states. [2021-11-12 22:20:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46336 to 44680. [2021-11-12 22:20:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44680 states, 33714 states have (on average 1.5751023313756896) internal successors, (53103), 35456 states have internal predecessors, (53103), 8569 states have call successors, (8569), 2179 states have call predecessors, (8569), 2396 states have return successors, (19328), 8396 states have call predecessors, (19328), 8487 states have call successors, (19328) [2021-11-12 22:20:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44680 states to 44680 states and 81000 transitions. [2021-11-12 22:20:39,361 INFO L78 Accepts]: Start accepts. Automaton has 44680 states and 81000 transitions. Word has length 132 [2021-11-12 22:20:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:39,361 INFO L470 AbstractCegarLoop]: Abstraction has 44680 states and 81000 transitions. [2021-11-12 22:20:39,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 4 states have call successors, (32), 4 states have call predecessors, (32), 6 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-11-12 22:20:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 44680 states and 81000 transitions. [2021-11-12 22:20:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 22:20:39,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:39,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:39,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:20:39,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:39,582 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1864685983, now seen corresponding path program 1 times [2021-11-12 22:20:39,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:39,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250203121] [2021-11-12 22:20:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:39,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:39,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:39,585 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:39,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:20:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:20:40,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:20:40,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-12 22:20:40,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:40,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250203121] [2021-11-12 22:20:40,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250203121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:40,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:40,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:20:40,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129021565] [2021-11-12 22:20:40,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:40,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:20:40,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:20:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:20:40,575 INFO L87 Difference]: Start difference. First operand 44680 states and 81000 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:20:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:20:45,678 INFO L93 Difference]: Finished difference Result 95034 states and 179075 transitions. [2021-11-12 22:20:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:20:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 136 [2021-11-12 22:20:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:20:46,389 INFO L225 Difference]: With dead ends: 95034 [2021-11-12 22:20:46,390 INFO L226 Difference]: Without dead ends: 56064 [2021-11-12 22:20:46,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:20:46,731 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 324 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 495.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 3388 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 551.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:20:46,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 3388 Invalid, 194 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [137 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 551.56ms Time] [2021-11-12 22:20:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56064 states. [2021-11-12 22:20:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56064 to 42158. [2021-11-12 22:20:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42158 states, 32482 states have (on average 1.5744412289883627) internal successors, (51141), 33872 states have internal predecessors, (51141), 7269 states have call successors, (7269), 2179 states have call predecessors, (7269), 2406 states have return successors, (16938), 7066 states have call predecessors, (16938), 7187 states have call successors, (16938) [2021-11-12 22:20:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42158 states to 42158 states and 75348 transitions. [2021-11-12 22:20:50,684 INFO L78 Accepts]: Start accepts. Automaton has 42158 states and 75348 transitions. Word has length 136 [2021-11-12 22:20:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:20:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 42158 states and 75348 transitions. [2021-11-12 22:20:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-12 22:20:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 42158 states and 75348 transitions. [2021-11-12 22:20:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 22:20:50,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:20:50,714 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:20:50,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 22:20:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:20:50,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:20:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:20:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1170885831, now seen corresponding path program 1 times [2021-11-12 22:20:50,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:20:50,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214333280] [2021-11-12 22:20:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:20:50,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:20:50,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:20:50,941 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:20:50,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_804080c2-ddcf-4812-b306-223aa4fea196/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:20:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:20:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:20:51,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:20:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-12 22:20:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:20:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:20:52,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:20:52,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214333280] [2021-11-12 22:20:52,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214333280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:20:52,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:20:52,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:20:52,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382645132] [2021-11-12 22:20:52,273 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:20:52,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:20:52,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:20:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:20:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:20:52,275 INFO L87 Difference]: Start difference. First operand 42158 states and 75348 transitions. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 22:20:54,308 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:20:56,313 WARN L515 Checker$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 22:21:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:21:08,409 INFO L93 Difference]: Finished difference Result 149836 states and 289969 transitions. [2021-11-12 22:21:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:21:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 8 states have internal predecessors, (155), 4 states have call successors, (30), 4 states have call predecessors, (30), 6 states have return successors, (29), 6 states have call predecessors, (29), 4 states have call successors, (29) Word has length 143 [2021-11-12 22:21:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:21:09,684 INFO L225 Difference]: With dead ends: 149836 [2021-11-12 22:21:09,684 INFO L226 Difference]: Without dead ends: 107680 [2021-11-12 22:21:10,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:21:10,306 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 1186 mSDsluCounter, 8744 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 206 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5614.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 10196 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.06ms SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5884.88ms IncrementalHoareTripleChecker+Time [2021-11-12 22:21:10,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 10196 Invalid, 950 Unknown, 0 Unchecked, 30.06ms Time], IncrementalHoareTripleChecker [206 Valid, 742 Invalid, 2 Unknown, 0 Unchecked, 5884.88ms Time] [2021-11-12 22:21:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107680 states.