./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan --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 6ccf0fb82c260d93e0a183861fdeec7e448b86af ...................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan --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 6ccf0fb82c260d93e0a183861fdeec7e448b86af ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 13:57:09,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 13:57:09,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 13:57:09,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 13:57:09,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 13:57:09,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 13:57:09,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 13:57:09,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 13:57:09,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 13:57:09,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 13:57:09,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 13:57:09,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 13:57:09,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 13:57:09,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 13:57:09,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 13:57:09,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 13:57:09,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 13:57:09,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 13:57:09,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 13:57:09,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 13:57:09,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 13:57:09,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 13:57:09,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 13:57:09,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 13:57:09,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 13:57:09,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 13:57:09,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 13:57:09,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 13:57:09,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 13:57:09,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 13:57:09,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 13:57:09,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 13:57:09,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 13:57:09,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 13:57:09,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 13:57:09,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 13:57:09,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 13:57:09,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 13:57:09,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 13:57:09,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 13:57:09,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 13:57:09,972 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 13:57:09,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 13:57:09,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 13:57:09,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 13:57:09,997 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 13:57:09,997 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 13:57:09,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 13:57:09,999 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 13:57:09,999 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 13:57:09,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 13:57:09,999 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 13:57:10,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 13:57:10,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 13:57:10,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 13:57:10,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 13:57:10,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 13:57:10,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 13:57:10,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 13:57:10,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 13:57:10,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 13:57:10,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 13:57:10,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:57:10,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 13:57:10,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 13:57:10,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 13:57:10,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 13:57:10,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 13:57:10,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 13:57:10,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 13:57:10,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 13:57:10,004 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-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ccf0fb82c260d93e0a183861fdeec7e448b86af [2020-12-09 13:57:10,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 13:57:10,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 13:57:10,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 13:57:10,210 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 13:57:10,210 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 13:57:10,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-12-09 13:57:10,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/1c62f4a05/5d929c9d69444bcf805ad4f808d083a8/FLAG0a283cf60 [2020-12-09 13:57:10,630 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 13:57:10,630 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-12-09 13:57:10,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/1c62f4a05/5d929c9d69444bcf805ad4f808d083a8/FLAG0a283cf60 [2020-12-09 13:57:10,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/1c62f4a05/5d929c9d69444bcf805ad4f808d083a8 [2020-12-09 13:57:10,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 13:57:10,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 13:57:10,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 13:57:10,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 13:57:10,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 13:57:10,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c31b8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10, skipping insertion in model container [2020-12-09 13:57:10,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 13:57:10,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:57:10,769 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2020-12-09 13:57:10,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:57:10,781 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 13:57:10,796 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2020-12-09 13:57:10,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:57:10,810 INFO L208 MainTranslator]: Completed translation [2020-12-09 13:57:10,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10 WrapperNode [2020-12-09 13:57:10,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 13:57:10,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 13:57:10,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 13:57:10,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 13:57:10,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 13:57:10,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 13:57:10,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 13:57:10,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 13:57:10,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... [2020-12-09 13:57:10,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 13:57:10,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 13:57:10,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 13:57:10,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 13:57:10,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:57:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-12-09 13:57:10,916 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-12-09 13:57:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 13:57:10,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 13:57:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 13:57:10,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 13:57:11,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 13:57:11,092 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 13:57:11,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:11 BoogieIcfgContainer [2020-12-09 13:57:11,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 13:57:11,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 13:57:11,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 13:57:11,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 13:57:11,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:57:10" (1/3) ... [2020-12-09 13:57:11,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eafabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:57:11, skipping insertion in model container [2020-12-09 13:57:11,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:10" (2/3) ... [2020-12-09 13:57:11,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eafabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:57:11, skipping insertion in model container [2020-12-09 13:57:11,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:11" (3/3) ... [2020-12-09 13:57:11,099 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-12-09 13:57:11,109 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 13:57:11,111 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 13:57:11,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 13:57:11,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 13:57:11,135 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 13:57:11,135 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 13:57:11,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 13:57:11,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 13:57:11,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 13:57:11,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 13:57:11,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 13:57:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-09 13:57:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 13:57:11,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:11,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:11,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:11,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1546859687, now seen corresponding path program 1 times [2020-12-09 13:57:11,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:57:11,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019520608] [2020-12-09 13:57:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:57:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 13:57:11,241 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 13:57:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 13:57:11,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 13:57:11,276 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 13:57:11,276 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 13:57:11,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 13:57:11,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:57:11 BoogieIcfgContainer [2020-12-09 13:57:11,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 13:57:11,296 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 13:57:11,296 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 13:57:11,296 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 13:57:11,296 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:11" (3/4) ... [2020-12-09 13:57:11,299 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 13:57:11,299 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 13:57:11,301 INFO L168 Benchmark]: Toolchain (without parser) took 653.48 ms. Allocated memory is still 98.6 MB. Free memory was 57.9 MB in the beginning and 58.1 MB in the end (delta: -147.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:57:11,301 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 73.8 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:57:11,302 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.38 ms. Allocated memory is still 98.6 MB. Free memory was 57.6 MB in the beginning and 74.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 13:57:11,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.92 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:57:11,303 INFO L168 Benchmark]: Boogie Preprocessor took 13.15 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 72.2 MB in the end (delta: 917.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 13:57:11,304 INFO L168 Benchmark]: RCFGBuilder took 237.99 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 71.9 MB in the end (delta: -105.6 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 13:57:11,305 INFO L168 Benchmark]: TraceAbstraction took 200.65 ms. Allocated memory is still 98.6 MB. Free memory was 71.5 MB in the beginning and 58.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 13:57:11,306 INFO L168 Benchmark]: Witness Printer took 3.23 ms. Allocated memory is still 98.6 MB. Free memory was 58.5 MB in the beginning and 58.1 MB in the end (delta: 401.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:57:11,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 73.8 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.38 ms. Allocated memory is still 98.6 MB. Free memory was 57.6 MB in the beginning and 74.3 MB in the end (delta: -16.6 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.92 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.15 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 72.2 MB in the end (delta: 917.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 237.99 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 71.9 MB in the end (delta: -105.6 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 200.65 ms. Allocated memory is still 98.6 MB. Free memory was 71.5 MB in the beginning and 58.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.23 ms. Allocated memory is still 98.6 MB. Free memory was 58.5 MB in the beginning and 58.1 MB in the end (delta: 401.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan 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 -> 6ccf0fb82c260d93e0a183861fdeec7e448b86af [2020-12-09 13:57:13,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 13:57:13,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 13:57:13,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 13:57:13,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 13:57:13,294 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 13:57:13,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-12-09 13:57:13,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/6b8039250/2304aa9a9ad64c848751f9047cf7cd54/FLAGb15fb3bce [2020-12-09 13:57:13,698 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 13:57:13,698 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2020-12-09 13:57:13,703 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/6b8039250/2304aa9a9ad64c848751f9047cf7cd54/FLAGb15fb3bce [2020-12-09 13:57:13,712 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/data/6b8039250/2304aa9a9ad64c848751f9047cf7cd54 [2020-12-09 13:57:13,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 13:57:13,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 13:57:13,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 13:57:13,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 13:57:13,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 13:57:13,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56449a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13, skipping insertion in model container [2020-12-09 13:57:13,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 13:57:13,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:57:13,833 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2020-12-09 13:57:13,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:57:13,844 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 13:57:13,854 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2020-12-09 13:57:13,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:57:13,873 INFO L208 MainTranslator]: Completed translation [2020-12-09 13:57:13,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13 WrapperNode [2020-12-09 13:57:13,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 13:57:13,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 13:57:13,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 13:57:13,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 13:57:13,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 13:57:13,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 13:57:13,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 13:57:13,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 13:57:13,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... [2020-12-09 13:57:13,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 13:57:13,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 13:57:13,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 13:57:13,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 13:57:13,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:57:13,991 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-12-09 13:57:13,991 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-12-09 13:57:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 13:57:13,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 13:57:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 13:57:13,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 13:57:14,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 13:57:14,154 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 13:57:14,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:14 BoogieIcfgContainer [2020-12-09 13:57:14,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 13:57:14,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 13:57:14,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 13:57:14,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 13:57:14,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:57:13" (1/3) ... [2020-12-09 13:57:14,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18337c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:57:14, skipping insertion in model container [2020-12-09 13:57:14,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:57:13" (2/3) ... [2020-12-09 13:57:14,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18337c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:57:14, skipping insertion in model container [2020-12-09 13:57:14,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:14" (3/3) ... [2020-12-09 13:57:14,161 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2020-12-09 13:57:14,172 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 13:57:14,174 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 13:57:14,181 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 13:57:14,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 13:57:14,198 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 13:57:14,198 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 13:57:14,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 13:57:14,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 13:57:14,199 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 13:57:14,199 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 13:57:14,199 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 13:57:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-09 13:57:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 13:57:14,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:14,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:14,212 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:14,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2020-12-09 13:57:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:14,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204425175] [2020-12-09 13:57:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 13:57:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:57:14,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 13:57:14,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204425175] [2020-12-09 13:57:14,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:57:14,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 13:57:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136734940] [2020-12-09 13:57:14,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 13:57:14,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 13:57:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 13:57:14,440 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 7 states. [2020-12-09 13:57:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:14,515 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-09 13:57:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 13:57:14,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-09 13:57:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:14,522 INFO L225 Difference]: With dead ends: 32 [2020-12-09 13:57:14,522 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 13:57:14,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 13:57:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 13:57:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 13:57:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 13:57:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-09 13:57:14,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-12-09 13:57:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:14,551 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-09 13:57:14,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 13:57:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-09 13:57:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 13:57:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:14,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:14,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 13:57:14,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2020-12-09 13:57:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:14,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043149646] [2020-12-09 13:57:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 13:57:14,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 13:57:14,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:15,166 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,168 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 13:57:15,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043149646] [2020-12-09 13:57:15,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [770370] [2020-12-09 13:57:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 13:57:15,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 13:57:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:15,539 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,540 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 13:57:15,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825085755] [2020-12-09 13:57:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 13:57:15,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 13:57:15,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:15,788 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,790 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 13:57:15,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:57:15,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2020-12-09 13:57:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119676590] [2020-12-09 13:57:15,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 13:57:15,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:15,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 13:57:15,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-12-09 13:57:15,868 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 16 states. [2020-12-09 13:57:16,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:16,152 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-09 13:57:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 13:57:16,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-12-09 13:57:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:16,153 INFO L225 Difference]: With dead ends: 28 [2020-12-09 13:57:16,153 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 13:57:16,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-12-09 13:57:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 13:57:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 13:57:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 13:57:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-09 13:57:16,158 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2020-12-09 13:57:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:16,158 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-09 13:57:16,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 13:57:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-09 13:57:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 13:57:16,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:16,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:16,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3,4 cvc4 --incremental --print-success --lang smt,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:16,763 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2020-12-09 13:57:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:16,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372411081] [2020-12-09 13:57:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:16,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 13:57:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:16,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:17,298 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:17,298 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:17,548 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:17,723 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:17,725 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:57:17,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372411081] [2020-12-09 13:57:17,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989397494] [2020-12-09 13:57:17,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 13:57:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 13:57:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:17,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:18,194 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,195 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,333 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,334 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,372 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:57:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813414011] [2020-12-09 13:57:18,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:18,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 13:57:18,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 13:57:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:18,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:18,682 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,682 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,833 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,834 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,871 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 13:57:18,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:57:18,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15, 13, 15] total 26 [2020-12-09 13:57:18,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641623272] [2020-12-09 13:57:18,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-09 13:57:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-09 13:57:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-12-09 13:57:18,891 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 26 states. [2020-12-09 13:57:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:19,422 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-09 13:57:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 13:57:19,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-09 13:57:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:19,424 INFO L225 Difference]: With dead ends: 34 [2020-12-09 13:57:19,424 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 13:57:19,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 13:57:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 13:57:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 13:57:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 13:57:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-09 13:57:19,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2020-12-09 13:57:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:19,431 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-09 13:57:19,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-09 13:57:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-09 13:57:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-09 13:57:19,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:19,433 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:20,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:20,035 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2020-12-09 13:57:20,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:20,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725943687] [2020-12-09 13:57:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 13:57:20,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 13:57:20,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:20,858 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:20,859 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,181 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,183 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,520 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,746 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,747 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,960 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:21,961 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725943687] [2020-12-09 13:57:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827372234] [2020-12-09 13:57:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:22,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 13:57:22,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:22,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 13:57:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 13:57:22,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:22,601 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:22,601 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:22,821 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:22,822 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,050 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,050 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,122 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,158 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:23,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399682768] [2020-12-09 13:57:23,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:23,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 13:57:23,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 13:57:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 13:57:23,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:23,689 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,689 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,931 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:23,932 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:24,102 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:24,178 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:24,213 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:24,214 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 13:57:24,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:57:24,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 17, 21, 17, 21] total 36 [2020-12-09 13:57:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275255280] [2020-12-09 13:57:24,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 13:57:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 13:57:24,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 13:57:24,239 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 36 states. [2020-12-09 13:57:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:25,138 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-09 13:57:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 13:57:25,139 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-12-09 13:57:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:25,140 INFO L225 Difference]: With dead ends: 40 [2020-12-09 13:57:25,140 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 13:57:25,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 191 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2020-12-09 13:57:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 13:57:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 13:57:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 13:57:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-09 13:57:25,146 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2020-12-09 13:57:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:25,146 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-09 13:57:25,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 13:57:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-09 13:57:25,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-09 13:57:25,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:25,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:25,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:25,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2020-12-09 13:57:25,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:25,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079361681] [2020-12-09 13:57:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 13:57:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-09 13:57:26,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:26,901 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:26,902 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:27,359 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:27,360 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:27,715 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,037 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,367 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,367 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,910 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:28,911 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-09 13:57:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079361681] [2020-12-09 13:57:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88424114] [2020-12-09 13:57:29,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:29,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 13:57:29,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 13:57:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-09 13:57:29,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:29,766 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:29,766 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,091 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,252 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,252 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,441 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,607 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,674 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-09 13:57:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553123988] [2020-12-09 13:57:30,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:30,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 13:57:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 13:57:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-09 13:57:30,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:31,460 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:31,461 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:31,872 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:31,873 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,115 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,116 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,263 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,264 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,442 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,443 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,516 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,553 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-09 13:57:32,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:57:32,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27, 21, 27] total 46 [2020-12-09 13:57:32,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888607940] [2020-12-09 13:57:32,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-09 13:57:32,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-09 13:57:32,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 13:57:32,583 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 46 states. [2020-12-09 13:57:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:33,816 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-12-09 13:57:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-09 13:57:33,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2020-12-09 13:57:33,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:33,817 INFO L225 Difference]: With dead ends: 46 [2020-12-09 13:57:33,817 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 13:57:33,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 239 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2020-12-09 13:57:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 13:57:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-09 13:57:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 13:57:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-09 13:57:33,826 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2020-12-09 13:57:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:33,826 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-09 13:57:33,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-09 13:57:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-09 13:57:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-09 13:57:33,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:33,828 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:34,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt,12 mathsat -unsat_core_generation=3 [2020-12-09 13:57:34,430 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:34,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:34,431 INFO L82 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2020-12-09 13:57:34,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:34,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357004655] [2020-12-09 13:57:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 13:57:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-09 13:57:35,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:35,904 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:35,904 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:36,414 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:36,829 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:37,220 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:37,221 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:37,588 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:37,931 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:38,253 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:38,254 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:38,568 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:38,963 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-09 13:57:39,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357004655] [2020-12-09 13:57:39,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865861983] [2020-12-09 13:57:39,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:39,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-09 13:57:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 13:57:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-09 13:57:39,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:39,991 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:39,993 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:40,378 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:40,604 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:40,794 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:40,795 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:40,952 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,121 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,122 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,216 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,279 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,392 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,393 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-09 13:57:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532143216] [2020-12-09 13:57:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:41,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-09 13:57:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:41,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-09 13:57:41,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-09 13:57:41,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:42,346 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:42,346 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:42,742 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:42,743 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:42,968 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:42,969 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,365 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,549 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,550 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,657 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,658 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,721 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,843 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-09 13:57:43,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:57:43,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 25, 33, 25, 33] total 56 [2020-12-09 13:57:43,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609077600] [2020-12-09 13:57:43,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-09 13:57:43,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:57:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-09 13:57:43,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2020-12-09 13:57:43,877 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 56 states. [2020-12-09 13:57:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:57:45,536 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-12-09 13:57:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-09 13:57:45,536 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-12-09 13:57:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:57:45,538 INFO L225 Difference]: With dead ends: 52 [2020-12-09 13:57:45,538 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 13:57:45,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 307 SyntacticMatches, 23 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2020-12-09 13:57:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 13:57:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 13:57:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 13:57:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-09 13:57:45,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2020-12-09 13:57:45,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:57:45,544 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-09 13:57:45,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-09 13:57:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-09 13:57:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 13:57:45,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:57:45,546 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:57:46,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt,15 mathsat -unsat_core_generation=3,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:46,148 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:57:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:57:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2020-12-09 13:57:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:57:46,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565142392] [2020-12-09 13:57:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-12-09 13:57:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:57:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-09 13:57:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-09 13:57:46,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:47,843 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:47,843 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:48,483 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:48,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:49,060 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:49,061 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:49,579 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:49,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:50,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:50,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:50,553 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:50,554 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:51,136 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:51,137 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:51,582 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:51,961 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:52,328 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:52,638 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 13:57:52,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565142392] [2020-12-09 13:57:52,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180628084] [2020-12-09 13:57:52,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:57:53,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-09 13:57:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-09 13:57:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-09 13:57:53,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:53,985 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:53,985 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:54,439 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:54,819 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,126 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,379 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,569 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,570 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,826 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:55,827 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,007 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,008 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,216 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,217 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,284 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,316 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 13:57:56,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995323951] [2020-12-09 13:57:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:57:56,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-09 13:57:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:57:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-09 13:57:56,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:57:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-09 13:57:56,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:57:57,496 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:57,497 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:57,979 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,318 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,319 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,638 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,639 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,875 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:58,875 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,165 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,531 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,531 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,668 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,870 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,870 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,933 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,934 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,970 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:57:59,970 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 13:58:00,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:58:00,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 29, 39, 29, 39] total 66 [2020-12-09 13:58:00,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461394670] [2020-12-09 13:58:00,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-09 13:58:00,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:58:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-09 13:58:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2020-12-09 13:58:00,096 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 66 states. [2020-12-09 13:58:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:58:02,360 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-09 13:58:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-09 13:58:02,361 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 77 [2020-12-09 13:58:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:58:02,362 INFO L225 Difference]: With dead ends: 58 [2020-12-09 13:58:02,362 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 13:58:02,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 360 SyntacticMatches, 32 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2020-12-09 13:58:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 13:58:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-09 13:58:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 13:58:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-09 13:58:02,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2020-12-09 13:58:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:58:02,369 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-09 13:58:02,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-09 13:58:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-09 13:58:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-09 13:58:02,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:58:02,371 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:58:02,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,19 cvc4 --incremental --print-success --lang smt,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:58:02,973 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:58:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:58:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2020-12-09 13:58:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:58:02,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288673509] [2020-12-09 13:58:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-12-09 13:58:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:58:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-09 13:58:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-09 13:58:03,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:05,083 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:05,083 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:05,817 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:05,818 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:06,500 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:07,161 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:07,161 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:07,750 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:08,319 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:08,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:09,345 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:09,346 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:09,846 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:10,493 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:10,952 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:10,953 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:11,387 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:11,388 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:11,863 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 13:58:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288673509] [2020-12-09 13:58:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815894649] [2020-12-09 13:58:12,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:58:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:58:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-09 13:58:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-09 13:58:12,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:13,381 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:13,382 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:13,952 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:13,953 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:14,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:14,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:14,748 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:15,125 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:15,477 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:15,827 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:15,828 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,207 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,207 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,459 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,459 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,568 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,633 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,787 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,788 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 13:58:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538136514] [2020-12-09 13:58:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:58:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:58:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-09 13:58:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-09 13:58:17,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:17,966 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:17,966 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:18,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:19,030 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:19,345 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:19,690 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:19,996 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:19,996 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:20,309 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:20,310 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:20,511 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:20,685 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:20,686 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,005 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,117 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,118 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,191 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,380 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,381 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 13:58:21,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:58:21,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45, 33, 45, 33, 45] total 76 [2020-12-09 13:58:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228860689] [2020-12-09 13:58:21,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-09 13:58:21,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:58:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-09 13:58:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2020-12-09 13:58:21,434 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 76 states. [2020-12-09 13:58:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:58:24,181 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-09 13:58:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-09 13:58:24,182 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 89 [2020-12-09 13:58:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:58:24,183 INFO L225 Difference]: With dead ends: 64 [2020-12-09 13:58:24,183 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 13:58:24,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 421 SyntacticMatches, 33 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2020-12-09 13:58:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 13:58:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-09 13:58:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 13:58:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-09 13:58:24,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2020-12-09 13:58:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:58:24,191 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-09 13:58:24,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-09 13:58:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-09 13:58:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-09 13:58:24,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:58:24,192 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:58:24,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:58:24,795 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:58:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:58:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2020-12-09 13:58:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:58:24,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104395470] [2020-12-09 13:58:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-12-09 13:58:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:58:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-09 13:58:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 13:58:25,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:27,212 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:27,212 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:27,967 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:28,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:29,311 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:29,312 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:29,936 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:29,937 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:30,550 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:31,160 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:31,760 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:32,343 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:32,343 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:32,902 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:32,903 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:33,430 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:33,964 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:33,965 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:34,465 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:34,466 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:34,980 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:35,382 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:35,383 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-09 13:58:35,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104395470] [2020-12-09 13:58:35,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937621501] [2020-12-09 13:58:35,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:58:35,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 13:58:35,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:58:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-09 13:58:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 13:58:36,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:37,143 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:37,143 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:37,803 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:38,255 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:38,862 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:38,863 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:39,294 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:39,295 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:39,641 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:39,939 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:40,277 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:40,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:40,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:40,856 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:40,857 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,015 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,288 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,289 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,392 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,459 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,648 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-09 13:58:41,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677793093] [2020-12-09 13:58:41,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:58:41,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 13:58:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:58:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-09 13:58:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 13:58:42,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:43,234 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:43,234 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:43,921 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:44,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:44,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:44,788 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:44,789 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:45,176 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:45,177 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:45,524 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:45,525 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:45,918 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:46,190 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:46,568 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:46,911 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,093 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,228 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,229 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,325 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,326 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,390 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-09 13:58:47,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:58:47,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 37, 51, 37, 51] total 86 [2020-12-09 13:58:47,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167279370] [2020-12-09 13:58:47,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-09 13:58:47,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:58:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-09 13:58:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2020-12-09 13:58:47,644 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 86 states. [2020-12-09 13:58:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:58:50,960 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-09 13:58:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-09 13:58:50,960 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 101 [2020-12-09 13:58:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:58:50,961 INFO L225 Difference]: With dead ends: 70 [2020-12-09 13:58:50,961 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 13:58:50,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 485 SyntacticMatches, 31 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3039 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2020-12-09 13:58:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 13:58:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-09 13:58:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 13:58:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-09 13:58:50,969 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2020-12-09 13:58:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:58:50,969 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-09 13:58:50,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-09 13:58:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-09 13:58:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-09 13:58:50,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:58:50,971 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:58:51,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 cvc4 --incremental --print-success --lang smt,24 mathsat -unsat_core_generation=3 [2020-12-09 13:58:51,573 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:58:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:58:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2020-12-09 13:58:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:58:51,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044671238] [2020-12-09 13:58:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 27 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with mathsat -unsat_core_generation=3 [2020-12-09 13:58:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:58:51,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-09 13:58:51,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:58:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-09 13:58:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:58:54,305 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:54,305 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:55,254 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:55,255 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:56,045 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:56,045 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:56,840 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:57,623 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:57,624 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:58,375 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:58,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:59,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:59,105 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:59,795 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:58:59,796 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:00,527 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:00,528 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:01,187 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:01,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:01,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:02,441 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:03,143 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:03,695 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:03,695 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:04,232 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:04,232 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:04,746 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:05,213 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-09 13:59:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044671238] [2020-12-09 13:59:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1887856487] [2020-12-09 13:59:05,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:59:05,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-09 13:59:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:59:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-09 13:59:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:59:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-09 13:59:06,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:59:07,332 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:07,332 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:08,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:08,536 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:08,536 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:09,045 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:09,046 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:09,501 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:09,502 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:09,977 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:10,363 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:10,696 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:11,087 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:11,370 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:11,615 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:11,615 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:11,829 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,141 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,271 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,368 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,616 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,617 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,649 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-09 13:59:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911256967] [2020-12-09 13:59:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:59:13,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-09 13:59:13,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:59:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-09 13:59:13,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:59:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-09 13:59:13,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:59:14,475 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:14,475 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:15,218 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:15,218 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:15,726 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:16,342 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:16,794 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,228 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,229 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,587 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,588 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,935 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:17,936 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:18,320 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:18,321 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:18,876 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,131 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,331 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,678 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,823 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,824 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,925 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,989 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:19,990 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:20,023 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-09 13:59:20,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:59:20,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57, 41, 57, 41, 57] total 96 [2020-12-09 13:59:20,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306420813] [2020-12-09 13:59:20,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-12-09 13:59:20,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:59:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-12-09 13:59:20,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2020-12-09 13:59:20,099 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 96 states. [2020-12-09 13:59:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:59:23,936 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-12-09 13:59:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-09 13:59:23,937 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 113 [2020-12-09 13:59:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:59:23,938 INFO L225 Difference]: With dead ends: 76 [2020-12-09 13:59:23,938 INFO L226 Difference]: Without dead ends: 70 [2020-12-09 13:59:23,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 546 SyntacticMatches, 32 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1274, Invalid=16816, Unknown=0, NotChecked=0, Total=18090 [2020-12-09 13:59:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-09 13:59:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-09 13:59:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 13:59:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-09 13:59:23,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2020-12-09 13:59:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:59:23,945 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-09 13:59:23,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-12-09 13:59:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-09 13:59:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-09 13:59:23,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:59:23,946 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 13:59:24,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 cvc4 --incremental --print-success --lang smt,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 mathsat -unsat_core_generation=3 [2020-12-09 13:59:24,548 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 13:59:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:59:24,549 INFO L82 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2020-12-09 13:59:24,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 13:59:24,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816772456] [2020-12-09 13:59:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 30 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with mathsat -unsat_core_generation=3 [2020-12-09 13:59:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:59:24,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-09 13:59:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:59:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-09 13:59:25,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:59:27,877 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:27,877 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:28,894 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:29,792 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:30,733 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:30,733 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:31,593 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:31,593 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:32,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:32,377 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:33,130 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:33,130 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:33,856 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:34,597 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:35,339 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:36,038 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:36,039 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:36,779 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:36,780 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:37,507 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:37,508 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:38,243 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:38,906 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:39,501 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:40,034 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:40,035 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:40,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:40,575 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:41,004 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:41,004 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-09 13:59:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816772456] [2020-12-09 13:59:41,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1893941284] [2020-12-09 13:59:41,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 31 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4 --incremental --print-success --lang smt [2020-12-09 13:59:41,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 13:59:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:59:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-09 13:59:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:59:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-09 13:59:41,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:59:43,211 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:43,212 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:44,171 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:44,172 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:44,778 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:45,297 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:45,812 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:45,812 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:46,367 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:46,368 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:46,803 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:47,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:47,671 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:48,215 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:48,216 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:48,506 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:48,807 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:48,808 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,044 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,329 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,330 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,503 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,504 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,756 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,756 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,867 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,940 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,976 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:49,977 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-09 13:59:50,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382385515] [2020-12-09 13:59:50,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:59:50,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 13:59:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:59:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-09 13:59:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:59:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-09 13:59:50,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:59:51,980 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:51,981 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:52,894 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:52,895 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:53,493 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:54,059 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:54,059 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:54,595 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:54,596 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:55,067 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:55,499 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:55,500 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:55,948 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:55,949 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:56,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:56,786 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:57,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:57,511 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:57,726 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:57,911 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,071 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,072 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,290 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,386 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,387 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,450 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,451 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 13:59:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-09 13:59:58,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 13:59:58,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63, 45, 63, 45, 63] total 106 [2020-12-09 13:59:58,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018110800] [2020-12-09 13:59:58,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-12-09 13:59:58,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 13:59:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-12-09 13:59:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2020-12-09 13:59:58,566 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 106 states. [2020-12-09 14:00:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:00:03,247 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-12-09 14:00:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-09 14:00:03,248 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 125 [2020-12-09 14:00:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:00:03,249 INFO L225 Difference]: With dead ends: 82 [2020-12-09 14:00:03,249 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 14:00:03,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 614 SyntacticMatches, 26 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2020-12-09 14:00:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 14:00:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-09 14:00:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 14:00:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-09 14:00:03,255 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2020-12-09 14:00:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:00:03,255 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-09 14:00:03,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-12-09 14:00:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-09 14:00:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-09 14:00:03,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:00:03,257 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:00:03,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 cvc4 --incremental --print-success --lang smt,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 mathsat -unsat_core_generation=3 [2020-12-09 14:00:03,859 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:00:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:00:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2020-12-09 14:00:03,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:00:03,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748215046] [2020-12-09 14:00:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 33 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with mathsat -unsat_core_generation=3 [2020-12-09 14:00:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:00:04,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-09 14:00:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:00:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-09 14:00:05,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:00:07,642 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:07,644 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:08,765 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:09,806 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:10,839 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:10,841 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:11,865 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:11,866 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:12,815 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:12,816 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:13,673 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:13,673 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:14,730 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:15,583 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:16,434 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:16,434 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:17,215 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:17,975 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:18,749 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:18,750 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:19,476 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:20,242 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:20,915 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:21,597 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:21,597 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:22,248 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:22,825 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:22,826 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:23,433 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:23,434 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:23,913 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-09 14:00:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748215046] [2020-12-09 14:00:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066279761] [2020-12-09 14:00:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 34 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:00:24,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-09 14:00:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:00:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-09 14:00:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:00:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-09 14:00:25,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:00:26,591 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:26,592 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:27,523 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:27,524 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:28,180 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:28,180 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:28,775 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:29,572 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:30,170 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:30,700 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:31,332 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:31,926 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:31,926 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:32,425 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:32,819 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,167 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,469 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,469 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,727 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,964 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:33,965 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,156 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,157 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,323 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,324 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,587 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,587 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,705 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,777 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,778 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,812 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-09 14:00:34,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95243685] [2020-12-09 14:00:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:00:35,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-09 14:00:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:00:35,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-09 14:00:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:00:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-09 14:00:35,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:00:37,337 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:37,338 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:38,180 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:38,841 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:38,842 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:39,455 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:40,197 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:40,198 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:40,847 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:40,848 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:41,354 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:42,039 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:42,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:42,593 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:42,594 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:43,129 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:43,130 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:43,489 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:43,489 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:43,823 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,474 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,717 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,925 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:44,925 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,088 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,089 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,218 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,313 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,314 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,598 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,598 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,636 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,637 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-09 14:00:45,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:00:45,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69, 49, 69, 49, 69] total 116 [2020-12-09 14:00:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230884369] [2020-12-09 14:00:45,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-12-09 14:00:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:00:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-12-09 14:00:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2020-12-09 14:00:45,729 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 116 states. [2020-12-09 14:00:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:00:51,040 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-09 14:00:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-09 14:00:51,040 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 137 [2020-12-09 14:00:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:00:51,041 INFO L225 Difference]: With dead ends: 88 [2020-12-09 14:00:51,041 INFO L226 Difference]: Without dead ends: 82 [2020-12-09 14:00:51,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 667 SyntacticMatches, 35 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5069 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2020-12-09 14:00:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-09 14:00:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-09 14:00:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-09 14:00:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-09 14:00:51,049 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2020-12-09 14:00:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:00:51,050 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-09 14:00:51,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-12-09 14:00:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-09 14:00:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-09 14:00:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:00:51,051 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:00:51,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 cvc4 --incremental --print-success --lang smt,33 mathsat -unsat_core_generation=3 [2020-12-09 14:00:51,654 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:00:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:00:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 12 times [2020-12-09 14:00:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:00:51,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63147965] [2020-12-09 14:00:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 36 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with mathsat -unsat_core_generation=3 [2020-12-09 14:00:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:00:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-09 14:00:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:00:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-09 14:00:53,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:00:55,833 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:55,833 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:57,082 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:57,082 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:58,202 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:58,202 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:00:59,273 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:00,229 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:00,230 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:01,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:01,409 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:02,638 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:03,757 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:04,666 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:04,667 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:05,540 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:05,541 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:06,414 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:06,414 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:07,244 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:07,244 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:08,054 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:08,055 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:08,834 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:08,834 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:09,594 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:10,367 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:11,114 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:11,115 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:11,849 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:12,542 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:13,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:13,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:13,870 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:13,870 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:14,524 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:15,077 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:15,078 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-09 14:01:15,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63147965] [2020-12-09 14:01:15,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334525426] [2020-12-09 14:01:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 37 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:01:16,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-12-09 14:01:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:01:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-09 14:01:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:01:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-09 14:01:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:01:18,039 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:18,039 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:18,958 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:19,674 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:20,407 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:21,094 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:22,056 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:22,781 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:23,447 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:23,448 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:23,960 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:23,961 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:24,533 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:24,973 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:25,498 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,041 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,041 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,386 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,708 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,709 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,994 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:26,994 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,226 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,226 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,542 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,542 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,720 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,721 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,857 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,858 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:27,962 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:28,032 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:28,032 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:28,064 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-09 14:01:28,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287868007] [2020-12-09 14:01:28,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:01:28,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-12-09 14:01:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:01:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-09 14:01:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:01:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-09 14:01:29,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:01:31,017 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:31,017 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:32,051 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:32,785 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:32,785 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:33,517 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:34,218 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:35,168 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:35,881 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:35,882 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:36,543 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:37,060 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:37,551 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:37,552 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:38,069 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:38,069 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:38,461 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:38,863 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,230 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,230 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,545 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,546 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,799 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:39,800 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,056 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,057 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,413 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,573 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,574 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,851 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,851 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,945 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:40,945 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:41,006 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:41,007 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:41,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-09 14:01:41,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:01:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75, 53, 75, 53, 75] total 126 [2020-12-09 14:01:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846006993] [2020-12-09 14:01:41,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-12-09 14:01:41,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:01:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-12-09 14:01:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2020-12-09 14:01:41,277 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 126 states. [2020-12-09 14:01:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:01:47,681 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-12-09 14:01:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-09 14:01:47,681 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 149 [2020-12-09 14:01:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:01:47,682 INFO L225 Difference]: With dead ends: 94 [2020-12-09 14:01:47,682 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 14:01:47,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 723 SyntacticMatches, 41 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6265 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2020-12-09 14:01:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 14:01:47,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-09 14:01:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-09 14:01:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-09 14:01:47,688 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2020-12-09 14:01:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:01:47,689 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-09 14:01:47,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-12-09 14:01:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-09 14:01:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-09 14:01:47,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:01:47,690 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:01:48,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 mathsat -unsat_core_generation=3,37 cvc4 --incremental --print-success --lang smt [2020-12-09 14:01:48,292 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:01:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:01:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 13 times [2020-12-09 14:01:48,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:01:48,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946651320] [2020-12-09 14:01:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 39 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with mathsat -unsat_core_generation=3 [2020-12-09 14:01:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:01:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-09 14:01:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:01:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-09 14:01:50,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:01:52,878 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:52,878 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:54,114 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:54,114 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:55,278 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:56,514 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:57,847 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:57,849 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:01:59,004 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:00,123 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:00,124 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:01,277 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:02,279 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:02,280 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:03,288 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:03,288 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:04,320 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:04,320 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:05,345 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:06,265 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:06,266 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:07,229 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:08,098 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:08,969 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:09,785 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:10,605 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:11,381 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:11,382 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:12,132 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:12,860 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:13,601 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:14,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:14,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:15,088 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:15,089 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:15,741 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-09 14:02:16,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946651320] [2020-12-09 14:02:16,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291446584] [2020-12-09 14:02:16,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 40 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:02:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:02:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-09 14:02:17,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:02:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-09 14:02:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:02:19,043 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:19,043 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:20,219 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:21,035 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:21,780 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:22,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:22,652 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:23,355 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:23,355 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:23,982 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:24,713 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:24,714 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:25,289 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:25,290 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:25,871 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:25,872 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:26,334 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:26,956 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:27,391 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:27,392 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:27,769 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:27,770 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:28,311 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:28,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:28,945 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:28,946 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,210 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,439 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,655 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,656 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,819 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:29,820 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:30,291 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:30,292 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:30,618 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:30,619 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:30,690 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:31,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-09 14:02:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90160716] [2020-12-09 14:02:31,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:02:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:02:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-09 14:02:31,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:02:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-09 14:02:32,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:02:33,823 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:33,824 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:34,931 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:34,932 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:35,794 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:36,569 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:36,569 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:37,482 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:38,182 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:38,934 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:38,935 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:39,777 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:39,778 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:40,493 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:41,095 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:41,575 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:42,250 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:42,793 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:42,794 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:43,194 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:43,195 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:43,739 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:43,740 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,080 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,494 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,494 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,762 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,763 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,995 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:44,995 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:45,191 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:45,568 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:45,569 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:46,275 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:46,618 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:46,684 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:47,128 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:47,128 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:02:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-09 14:02:47,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:02:47,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81, 57, 81, 57, 81] total 136 [2020-12-09 14:02:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887211033] [2020-12-09 14:02:47,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 136 states [2020-12-09 14:02:47,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:02:47,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2020-12-09 14:02:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2020-12-09 14:02:47,267 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 136 states. [2020-12-09 14:02:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:02:54,495 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-09 14:02:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-09 14:02:54,496 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 161 [2020-12-09 14:02:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:02:54,497 INFO L225 Difference]: With dead ends: 100 [2020-12-09 14:02:54,497 INFO L226 Difference]: Without dead ends: 94 [2020-12-09 14:02:54,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 781 SyntacticMatches, 45 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7553 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2020-12-09 14:02:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-09 14:02:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-09 14:02:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-09 14:02:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-09 14:02:54,502 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2020-12-09 14:02:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:02:54,503 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-09 14:02:54,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 136 states. [2020-12-09 14:02:54,503 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-09 14:02:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-09 14:02:54,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:02:54,504 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:02:55,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 mathsat -unsat_core_generation=3,40 cvc4 --incremental --print-success --lang smt,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:02:55,106 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:02:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:02:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 14 times [2020-12-09 14:02:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:02:55,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951553517] [2020-12-09 14:02:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 42 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with mathsat -unsat_core_generation=3 [2020-12-09 14:02:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:02:55,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-09 14:02:55,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:02:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-12-09 14:02:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:03:00,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:00,306 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:01,666 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:01,667 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:02,939 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:02,940 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:04,238 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:05,404 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:06,716 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:06,716 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:08,109 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:09,247 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:10,313 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:10,314 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:11,416 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:12,643 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:12,643 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:13,906 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:13,906 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:14,931 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:14,932 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:16,102 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:17,078 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:17,078 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:18,022 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:18,022 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:18,933 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:19,844 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:20,743 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:21,595 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:21,595 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:22,455 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:23,261 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:24,081 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:24,867 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:25,628 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:25,629 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:26,382 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:27,013 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:27,014 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-09 14:03:27,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951553517] [2020-12-09 14:03:27,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604638506] [2020-12-09 14:03:27,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 43 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:03:28,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 14:03:28,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:03:28,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-09 14:03:28,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:03:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-12-09 14:03:28,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:03:30,679 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:30,680 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:31,902 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:33,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:33,987 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:35,063 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:35,063 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:35,990 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:36,890 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:36,890 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:37,533 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:37,534 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:38,189 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:38,933 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:39,740 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:39,741 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:40,951 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:41,452 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:41,453 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:42,109 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:42,728 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:42,729 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:43,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:43,579 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:43,579 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:44,139 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:44,140 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:44,454 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:44,454 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:44,841 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,055 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,249 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,414 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,414 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,543 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,543 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,890 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,890 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,953 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:45,953 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:46,243 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:46,244 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-09 14:03:46,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005788785] [2020-12-09 14:03:46,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:03:47,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 14:03:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:03:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-09 14:03:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:03:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-12-09 14:03:47,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:03:49,435 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:49,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:50,644 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:51,529 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:51,530 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:52,531 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:52,533 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:53,307 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:54,366 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:55,221 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:55,918 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:55,918 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:56,554 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:56,554 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:57,269 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:57,999 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:58,717 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:03:59,481 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:00,152 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:00,153 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:00,761 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:00,762 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:01,259 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:01,620 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:01,956 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:02,406 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:02,809 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,281 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,282 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,494 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,494 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,670 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,957 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:03,958 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,057 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,057 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,125 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,125 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,156 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-09 14:04:04,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:04:04,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87, 61, 87, 61, 87] total 146 [2020-12-09 14:04:04,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498849627] [2020-12-09 14:04:04,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 146 states [2020-12-09 14:04:04,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:04:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2020-12-09 14:04:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2020-12-09 14:04:04,307 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 146 states. [2020-12-09 14:04:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:04:12,632 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-12-09 14:04:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-09 14:04:12,632 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 173 [2020-12-09 14:04:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:04:12,633 INFO L225 Difference]: With dead ends: 106 [2020-12-09 14:04:12,633 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 14:04:12,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 826 SyntacticMatches, 62 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9736 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2020-12-09 14:04:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 14:04:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-09 14:04:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-09 14:04:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-09 14:04:12,640 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2020-12-09 14:04:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:04:12,641 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-09 14:04:12,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 146 states. [2020-12-09 14:04:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-09 14:04:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-09 14:04:12,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:04:12,642 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:04:13,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 mathsat -unsat_core_generation=3,43 cvc4 --incremental --print-success --lang smt,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:04:13,244 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:04:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:04:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 15 times [2020-12-09 14:04:13,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:04:13,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314763131] [2020-12-09 14:04:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 45 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with mathsat -unsat_core_generation=3 [2020-12-09 14:04:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:04:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjunts are in the unsatisfiable core [2020-12-09 14:04:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:04:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-09 14:04:16,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:04:19,040 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:19,041 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:20,735 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:22,074 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:23,322 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:23,322 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:24,613 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:25,926 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:25,927 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:27,137 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:28,439 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:29,653 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:30,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:30,838 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:32,053 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:33,171 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:34,263 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:35,421 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:35,421 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:36,661 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:36,662 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:37,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:38,800 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:39,857 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:39,858 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:40,815 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:40,816 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:41,744 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:41,745 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:42,710 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:43,701 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:44,657 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:44,658 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:45,513 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:46,352 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:46,353 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:47,192 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:47,193 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:48,007 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:48,808 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:48,809 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:49,465 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-09 14:04:49,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314763131] [2020-12-09 14:04:49,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673644425] [2020-12-09 14:04:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/cvc4 Starting monitored process 46 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:04:51,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-09 14:04:51,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:04:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjunts are in the unsatisfiable core [2020-12-09 14:04:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:04:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-09 14:04:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:04:53,812 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:53,812 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:55,211 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:55,212 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:56,137 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:57,117 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:57,993 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:58,814 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:58,815 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:04:59,769 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:00,499 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:00,499 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:01,376 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:02,053 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:02,054 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:02,668 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:03,237 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:03,238 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:03,772 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:04,473 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:05,421 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:06,267 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:06,267 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:06,704 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:07,450 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:07,805 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:08,142 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:08,143 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:09,112 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:09,572 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,051 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,645 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,645 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,814 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,947 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:10,948 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,048 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,049 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,117 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,118 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,344 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,344 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-09 14:05:11,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481115152] [2020-12-09 14:05:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:05:12,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-09 14:05:12,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:05:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 124 conjunts are in the unsatisfiable core [2020-12-09 14:05:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:05:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-12-09 14:05:13,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:05:15,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:15,200 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:16,559 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:16,560 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:17,471 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:18,530 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:18,530 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:19,597 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:20,453 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:20,453 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:21,470 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:21,470 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:22,261 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:22,976 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:23,706 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:24,374 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:24,998 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:24,998 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:25,576 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:25,576 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:26,223 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:26,224 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:27,146 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:27,146 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:27,727 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:28,309 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:28,309 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:28,917 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:28,918 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:29,400 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:29,727 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:30,234 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:30,496 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:30,733 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:30,734 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,412 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,413 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,580 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,709 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,709 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,810 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,874 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,875 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:31,906 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:05:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-09 14:05:32,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 14:05:32,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93, 65, 93, 65, 93] total 156 [2020-12-09 14:05:32,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892353584] [2020-12-09 14:05:32,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 156 states [2020-12-09 14:05:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:05:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2020-12-09 14:05:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2020-12-09 14:05:32,081 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 156 states. [2020-12-09 14:05:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:05:41,562 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-12-09 14:05:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-09 14:05:41,563 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 185 [2020-12-09 14:05:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:05:41,564 INFO L225 Difference]: With dead ends: 112 [2020-12-09 14:05:41,564 INFO L226 Difference]: Without dead ends: 106 [2020-12-09 14:05:41,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 887 SyntacticMatches, 63 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10895 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2020-12-09 14:05:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-09 14:05:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-09 14:05:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-09 14:05:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-12-09 14:05:41,570 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2020-12-09 14:05:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:05:41,570 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-12-09 14:05:41,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 156 states. [2020-12-09 14:05:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-12-09 14:05:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-09 14:05:41,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:05:41,571 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:05:42,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 mathsat -unsat_core_generation=3,46 cvc4 --incremental --print-success --lang smt [2020-12-09 14:05:42,173 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:05:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:05:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 16 times [2020-12-09 14:05:42,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:05:42,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476390154] [2020-12-09 14:05:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/mathsat Starting monitored process 48 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with mathsat -unsat_core_generation=3 [2020-12-09 14:05:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 14:05:43,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 14:05:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 14:05:43,690 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 14:05:43,833 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 14:05:43,833 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 14:05:44,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 mathsat -unsat_core_generation=3 [2020-12-09 14:05:44,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:05:44 BoogieIcfgContainer [2020-12-09 14:05:44,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 14:05:44,129 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 14:05:44,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 14:05:44,129 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 14:05:44,130 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:57:14" (3/4) ... [2020-12-09 14:05:44,131 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 14:05:44,180 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2e734e1e-f729-460d-aafe-61fa0f2ade5f/bin/utaipan/witness.graphml [2020-12-09 14:05:44,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 14:05:44,182 INFO L168 Benchmark]: Toolchain (without parser) took 510466.53 ms. Allocated memory was 54.5 MB in the beginning and 283.1 MB in the end (delta: 228.6 MB). Free memory was 32.6 MB in the beginning and 63.7 MB in the end (delta: -31.1 MB). Peak memory consumption was 195.5 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,182 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory is still 36.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:05:44,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.17 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 32.4 MB in the beginning and 60.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.06 ms. Allocated memory is still 75.5 MB. Free memory was 60.3 MB in the beginning and 58.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,183 INFO L168 Benchmark]: Boogie Preprocessor took 16.06 ms. Allocated memory is still 75.5 MB. Free memory was 58.9 MB in the beginning and 57.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:05:44,183 INFO L168 Benchmark]: RCFGBuilder took 229.34 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 45.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,183 INFO L168 Benchmark]: TraceAbstraction took 509972.85 ms. Allocated memory was 75.5 MB in the beginning and 283.1 MB in the end (delta: 207.6 MB). Free memory was 45.2 MB in the beginning and 72.1 MB in the end (delta: -26.8 MB). Peak memory consumption was 181.8 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,184 INFO L168 Benchmark]: Witness Printer took 51.30 ms. Allocated memory is still 283.1 MB. Free memory was 72.1 MB in the beginning and 63.7 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 14:05:44,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory is still 36.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 158.17 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 32.4 MB in the beginning and 60.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.06 ms. Allocated memory is still 75.5 MB. Free memory was 60.3 MB in the beginning and 58.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.06 ms. Allocated memory is still 75.5 MB. Free memory was 58.9 MB in the beginning and 57.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 229.34 ms. Allocated memory is still 75.5 MB. Free memory was 57.8 MB in the beginning and 45.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 509972.85 ms. Allocated memory was 75.5 MB in the beginning and 283.1 MB in the end (delta: 207.6 MB). Free memory was 45.2 MB in the beginning and 72.1 MB in the end (delta: -26.8 MB). Peak memory consumption was 181.8 MB. Max. memory is 16.1 GB. * Witness Printer took 51.30 ms. Allocated memory is still 283.1 MB. Free memory was 72.1 MB in the beginning and 63.7 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) [L31] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L19] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L19] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L19] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L19] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L19] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L19] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L19] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L19] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L19] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L19] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L19] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L19] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L19] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L19] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L19] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L19] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L19] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L19] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L19] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L19] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L19] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L19] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L19] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L19] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L19] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L19] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L19] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<