./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh --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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:04:32,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:04:32,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:04:32,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:04:32,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:04:32,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:04:32,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:04:32,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:04:32,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:04:32,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:04:32,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:04:32,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:04:32,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:04:32,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:04:32,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:04:32,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:04:32,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:04:32,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:04:32,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:04:32,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:04:32,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:04:32,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:04:32,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:04:32,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:04:32,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:04:32,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:04:32,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:04:32,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:04:32,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:04:32,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:04:32,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:04:32,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:04:32,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:04:32,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:04:32,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:04:32,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:04:32,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:04:32,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:04:32,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:04:32,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:04:32,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:04:32,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:04:32,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:04:32,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:04:32,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:04:32,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:04:32,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:04:32,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:04:32,873 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:04:32,873 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:04:32,874 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:04:32,874 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:04:32,875 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:04:32,875 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:04:32,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:04:32,875 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:04:32,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:04:32,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:04:32,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:04:32,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:04:32,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:04:32,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:04:32,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:04:32,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:04:32,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:04:32,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-12-14 07:04:33,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:04:33,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:04:33,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:04:33,122 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:04:33,123 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:04:33,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-12-14 07:04:35,740 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:04:35,884 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:04:35,884 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-12-14 07:04:35,890 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data/890606b1f/daa14720e3e54bcfb78a1f7e15247625/FLAG7167a9cde [2022-12-14 07:04:35,902 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data/890606b1f/daa14720e3e54bcfb78a1f7e15247625 [2022-12-14 07:04:35,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:04:35,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:04:35,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:04:35,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:04:35,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:04:35,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:04:35" (1/1) ... [2022-12-14 07:04:35,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d5a641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:35, skipping insertion in model container [2022-12-14 07:04:35,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:04:35" (1/1) ... [2022-12-14 07:04:35,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:04:35,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:04:36,030 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-12-14 07:04:36,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:04:36,040 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:04:36,050 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-12-14 07:04:36,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:04:36,060 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:04:36,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36 WrapperNode [2022-12-14 07:04:36,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:04:36,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:04:36,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:04:36,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:04:36,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,084 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2022-12-14 07:04:36,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:04:36,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:04:36,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:04:36,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:04:36,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,096 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:04:36,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:04:36,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:04:36,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:04:36,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (1/1) ... [2022-12-14 07:04:36,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:04:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:36,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:04:36,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:04:36,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:04:36,149 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-12-14 07:04:36,149 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-12-14 07:04:36,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:04:36,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:04:36,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:04:36,198 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:04:36,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:04:36,278 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:04:36,290 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:04:36,290 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 07:04:36,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:36 BoogieIcfgContainer [2022-12-14 07:04:36,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:04:36,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:04:36,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:04:36,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:04:36,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:04:35" (1/3) ... [2022-12-14 07:04:36,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4dd1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:04:36, skipping insertion in model container [2022-12-14 07:04:36,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:36" (2/3) ... [2022-12-14 07:04:36,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4dd1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:04:36, skipping insertion in model container [2022-12-14 07:04:36,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:36" (3/3) ... [2022-12-14 07:04:36,301 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-12-14 07:04:36,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:04:36,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:04:36,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:04:36,386 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3bfa485c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:04:36,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:04:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:04:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:04:36,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:36,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:36,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1546859687, now seen corresponding path program 1 times [2022-12-14 07:04:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:04:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331205555] [2022-12-14 07:04:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:36,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:04:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:04:36,526 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:04:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:04:36,558 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:04:36,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:04:36,561 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 07:04:36,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:04:36,568 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 07:04:36,572 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 07:04:36,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:04:36 BoogieIcfgContainer [2022-12-14 07:04:36,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 07:04:36,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 07:04:36,591 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 07:04:36,591 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 07:04:36,591 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:36" (3/4) ... [2022-12-14 07:04:36,595 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 07:04:36,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 07:04:36,596 INFO L158 Benchmark]: Toolchain (without parser) took 691.03ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 70.5MB in the beginning and 107.6MB in the end (delta: -37.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:04:36,596 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:04:36,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.53ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 60.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:04:36,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.41ms. Allocated memory is still 111.1MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:04:36,598 INFO L158 Benchmark]: Boogie Preprocessor took 12.97ms. Allocated memory is still 111.1MB. Free memory was 59.0MB in the beginning and 58.2MB in the end (delta: 733.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:04:36,599 INFO L158 Benchmark]: RCFGBuilder took 194.61ms. Allocated memory is still 111.1MB. Free memory was 57.9MB in the beginning and 48.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:04:36,599 INFO L158 Benchmark]: TraceAbstraction took 294.93ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 47.5MB in the beginning and 108.4MB in the end (delta: -60.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:04:36,600 INFO L158 Benchmark]: Witness Printer took 4.40ms. Allocated memory is still 144.7MB. Free memory was 108.4MB in the beginning and 107.6MB in the end (delta: 762.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:04:36,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 84.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.53ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 60.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.41ms. Allocated memory is still 111.1MB. Free memory was 60.6MB in the beginning and 59.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.97ms. Allocated memory is still 111.1MB. Free memory was 59.0MB in the beginning and 58.2MB in the end (delta: 733.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 194.61ms. Allocated memory is still 111.1MB. Free memory was 57.9MB in the beginning and 48.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 294.93ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 47.5MB in the beginning and 108.4MB in the end (delta: -60.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.40ms. Allocated memory is still 144.7MB. Free memory was 108.4MB in the beginning and 107.6MB in the end (delta: 762.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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) VAL [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) VAL [hanoi(n)=1, n=1] [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_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2022-12-14 07:04:38,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:04:38,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:04:38,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:04:38,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:04:38,609 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:04:38,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-12-14 07:04:41,206 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:04:41,358 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:04:41,358 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-12-14 07:04:41,363 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data/794f5ddd0/e2f5d0ca1ea3490babd285e939dcd698/FLAG8e0d3243a [2022-12-14 07:04:41,376 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/data/794f5ddd0/e2f5d0ca1ea3490babd285e939dcd698 [2022-12-14 07:04:41,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:04:41,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:04:41,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:04:41,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:04:41,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:04:41,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fa68fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41, skipping insertion in model container [2022-12-14 07:04:41,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:04:41,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:04:41,515 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-12-14 07:04:41,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:04:41,532 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:04:41,546 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-12-14 07:04:41,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:04:41,560 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:04:41,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41 WrapperNode [2022-12-14 07:04:41,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:04:41,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:04:41,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:04:41,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:04:41,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,590 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-12-14 07:04:41,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:04:41,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:04:41,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:04:41,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:04:41,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,609 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:04:41,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:04:41,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:04:41,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:04:41,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (1/1) ... [2022-12-14 07:04:41,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:04:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:41,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:04:41,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:04:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:04:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-12-14 07:04:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-12-14 07:04:41,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:04:41,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:04:41,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:04:41,733 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:04:41,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:04:41,841 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:04:41,850 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:04:41,850 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 07:04:41,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:41 BoogieIcfgContainer [2022-12-14 07:04:41,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:04:41,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:04:41,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:04:41,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:04:41,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:04:41" (1/3) ... [2022-12-14 07:04:41,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f19816c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:04:41, skipping insertion in model container [2022-12-14 07:04:41,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:04:41" (2/3) ... [2022-12-14 07:04:41,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f19816c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:04:41, skipping insertion in model container [2022-12-14 07:04:41,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:41" (3/3) ... [2022-12-14 07:04:41,862 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-12-14 07:04:41,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:04:41,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:04:41,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:04:41,935 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@290af5c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:04:41,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:04:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:04:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:04:41,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:41,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:41,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2022-12-14 07:04:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:04:41,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099933225] [2022-12-14 07:04:41,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:41,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:41,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:04:41,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:04:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 07:04:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:04:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:04:42,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:04:42,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:04:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099933225] [2022-12-14 07:04:42,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099933225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:04:42,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:04:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:04:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211368368] [2022-12-14 07:04:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:04:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:04:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:04:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:04:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:04:42,218 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:04:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:42,301 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-12-14 07:04:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:04:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 07:04:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:42,308 INFO L225 Difference]: With dead ends: 32 [2022-12-14 07:04:42,308 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 07:04:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:04:42,312 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:42,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 51 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:04:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 07:04:42,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 07:04:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 07:04:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 07:04:42,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-12-14 07:04:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:42,337 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 07:04:42,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:04:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 07:04:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:04:42,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:42,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:42,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:42,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:42,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2022-12-14 07:04:42,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:04:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689519087] [2022-12-14 07:04:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:42,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:42,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:04:42,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:04:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 07:04:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:04:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:04:42,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:04:43,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:04:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [689519087] [2022-12-14 07:04:43,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [689519087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686558585] [2022-12-14 07:04:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:43,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:04:43,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:04:43,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:04:43,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-12-14 07:04:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:43,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:04:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:04:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:04:43,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686558585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315998713] [2022-12-14 07:04:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:04:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:43,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:04:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:04:43,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:04:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:04:43,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:04:43,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315998713] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:43,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:04:43,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-12-14 07:04:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788911878] [2022-12-14 07:04:43,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:04:43,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:04:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:04:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:04:43,924 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:44,203 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-12-14 07:04:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:04:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-12-14 07:04:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:44,204 INFO L225 Difference]: With dead ends: 28 [2022-12-14 07:04:44,204 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:04:44,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:04:44,206 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:44,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:04:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:04:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 07:04:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 07:04:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 07:04:44,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-12-14 07:04:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:44,213 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 07:04:44,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:04:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 07:04:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 07:04:44,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:44,214 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:44,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:44,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:44,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:04:44,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2022-12-14 07:04:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:04:44,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49789448] [2022-12-14 07:04:44,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:04:44,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:44,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:04:44,823 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:04:44,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 07:04:44,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:04:44,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:44,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:04:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:44,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:04:46,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:04:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49789448] [2022-12-14 07:04:46,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49789448] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:46,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899918977] [2022-12-14 07:04:46,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:04:46,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:04:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:04:46,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:04:46,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 07:04:46,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:04:46,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:04:46,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:46,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:04:46,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [899918977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:46,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797036368] [2022-12-14 07:04:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:04:46,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:46,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:46,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:04:46,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:04:46,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:04:46,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:46,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:04:47,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797036368] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:47,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:04:47,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15, 13, 15] total 26 [2022-12-14 07:04:47,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026176965] [2022-12-14 07:04:47,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:47,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:04:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:04:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:04:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:04:47,381 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:04:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:47,900 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-12-14 07:04:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 07:04:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2022-12-14 07:04:47,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:47,902 INFO L225 Difference]: With dead ends: 34 [2022-12-14 07:04:47,902 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 07:04:47,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:04:47,905 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:47,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 117 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:04:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 07:04:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 07:04:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 07:04:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-12-14 07:04:47,909 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2022-12-14 07:04:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:47,909 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-12-14 07:04:47,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 07:04:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-12-14 07:04:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:04:47,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:47,910 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:47,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 07:04:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:48,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:04:48,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:48,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:48,513 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2022-12-14 07:04:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:04:48,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207080540] [2022-12-14 07:04:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:04:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:04:48,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:04:48,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 07:04:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:04:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:04:48,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:04:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:50,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:04:50,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207080540] [2022-12-14 07:04:50,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207080540] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:50,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [891046336] [2022-12-14 07:04:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:04:50,599 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:04:50,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:04:50,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:04:50,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 07:04:50,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:04:50,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:04:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 07:04:50,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [891046336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614763607] [2022-12-14 07:04:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:04:51,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:51,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:04:51,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:04:51,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:04:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 07:04:51,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:04:52,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614763607] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:52,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:04:52,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18, 21, 17, 21] total 37 [2022-12-14 07:04:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492790533] [2022-12-14 07:04:52,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:04:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 07:04:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:04:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 07:04:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:04:52,778 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 25 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2022-12-14 07:04:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:04:53,698 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-12-14 07:04:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:04:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 25 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 41 [2022-12-14 07:04:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:04:53,700 INFO L225 Difference]: With dead ends: 40 [2022-12-14 07:04:53,700 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 07:04:53,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 07:04:53,701 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:04:53,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 208 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:04:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 07:04:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 07:04:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-14 07:04:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-14 07:04:53,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2022-12-14 07:04:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:04:53,706 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-14 07:04:53,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 25 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2022-12-14 07:04:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-14 07:04:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 07:04:53,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:04:53,707 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:04:53,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:04:53,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-12-14 07:04:54,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-14 07:04:54,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:54,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:04:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:04:54,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2022-12-14 07:04:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:04:54,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598223727] [2022-12-14 07:04:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:04:54,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:04:54,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:04:54,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:04:54,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 07:04:54,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:04:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:54,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 07:04:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:04:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:04:57,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:04:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598223727] [2022-12-14 07:04:57,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598223727] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:57,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2078583097] [2022-12-14 07:04:57,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:04:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:04:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:04:57,556 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:04:57,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 07:04:57,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:04:57,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:57,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 07:04:57,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:04:57,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:04:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:04:59,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2078583097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:04:59,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919122704] [2022-12-14 07:04:59,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:04:59,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:04:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:04:59,050 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:04:59,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:04:59,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:04:59,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:04:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 07:04:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:04:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:04:59,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:05:00,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919122704] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:00,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:05:00,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27, 21, 27] total 46 [2022-12-14 07:05:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153760645] [2022-12-14 07:05:00,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:00,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 07:05:00,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:05:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 07:05:00,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 07:05:00,532 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 07:05:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:01,598 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-12-14 07:05:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 07:05:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2022-12-14 07:05:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:01,600 INFO L225 Difference]: With dead ends: 46 [2022-12-14 07:05:01,600 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 07:05:01,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 07:05:01,601 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:01,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 300 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:05:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 07:05:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 07:05:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 07:05:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 07:05:01,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2022-12-14 07:05:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:01,605 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 07:05:01,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 07:05:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 07:05:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 07:05:01,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:01,606 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:01,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 07:05:01,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 07:05:02,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:02,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:02,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:02,210 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2022-12-14 07:05:02,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:05:02,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415398225] [2022-12-14 07:05:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:05:02,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:05:02,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:05:02,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 07:05:02,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-14 07:05:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:02,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 07:05:02,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 07:05:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 07:05:06,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:05:06,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415398225] [2022-12-14 07:05:06,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415398225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:06,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [350011234] [2022-12-14 07:05:06,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:05:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:05:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:05:06,169 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:05:06,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 07:05:06,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-14 07:05:06,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 07:05:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 07:05:06,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 07:05:08,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [350011234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026676425] [2022-12-14 07:05:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:05:08,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:08,300 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:08,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 07:05:08,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-14 07:05:08,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 07:05:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 07:05:08,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 07:05:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026676425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:10,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:05:10,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 25, 33, 25, 33] total 56 [2022-12-14 07:05:10,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274935906] [2022-12-14 07:05:10,445 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 07:05:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:05:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 07:05:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:05:10,450 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 07:05:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:11,880 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-12-14 07:05:11,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:05:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2022-12-14 07:05:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:11,881 INFO L225 Difference]: With dead ends: 52 [2022-12-14 07:05:11,881 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 07:05:11,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 07:05:11,883 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:11,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 382 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:05:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 07:05:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 07:05:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 07:05:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-12-14 07:05:11,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2022-12-14 07:05:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:11,887 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-12-14 07:05:11,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 07:05:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-12-14 07:05:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 07:05:11,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:11,888 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:11,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 07:05:12,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 07:05:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-12-14 07:05:12,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:12,490 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2022-12-14 07:05:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:05:12,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357375985] [2022-12-14 07:05:12,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:05:12,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:12,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:05:12,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:05:12,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 07:05:12,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-14 07:05:12,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:05:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-14 07:05:13,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:05:18,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:05:18,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357375985] [2022-12-14 07:05:18,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357375985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:18,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446768439] [2022-12-14 07:05:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:05:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:05:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:05:18,353 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:05:18,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 07:05:18,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-14 07:05:18,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 07:05:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-14 07:05:18,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:05:21,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446768439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:21,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850938514] [2022-12-14 07:05:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:05:21,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:21,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:21,700 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:21,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:05:21,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-14 07:05:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 07:05:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-14 07:05:21,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 07:05:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850938514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:24,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:05:24,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39, 30, 39, 29, 39] total 67 [2022-12-14 07:05:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264766783] [2022-12-14 07:05:24,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:24,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 07:05:24,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:05:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 07:05:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4174, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 07:05:24,774 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 67 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 43 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 24 states have return successors, (25), 24 states have call predecessors, (25), 15 states have call successors, (25) [2022-12-14 07:05:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:26,840 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-12-14 07:05:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 07:05:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 43 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 24 states have return successors, (25), 24 states have call predecessors, (25), 15 states have call successors, (25) Word has length 77 [2022-12-14 07:05:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:26,842 INFO L225 Difference]: With dead ends: 58 [2022-12-14 07:05:26,842 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 07:05:26,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=748, Invalid=7994, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 07:05:26,845 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:26,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 629 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:05:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 07:05:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 07:05:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 07:05:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-12-14 07:05:26,852 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2022-12-14 07:05:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:26,852 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-12-14 07:05:26,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 43 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 24 states have return successors, (25), 24 states have call predecessors, (25), 15 states have call successors, (25) [2022-12-14 07:05:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-12-14 07:05:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 07:05:26,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:26,854 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:26,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 07:05:27,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:05:27,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 07:05:27,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:05:27,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2022-12-14 07:05:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:05:27,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101245297] [2022-12-14 07:05:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:05:27,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:05:27,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:05:27,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 07:05:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 07:05:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 07:05:28,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 07:05:35,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:05:35,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101245297] [2022-12-14 07:05:35,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101245297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:35,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1698079868] [2022-12-14 07:05:35,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:05:35,357 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:05:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:05:35,358 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:05:35,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 07:05:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:35,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 07:05:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 07:05:35,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 07:05:39,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1698079868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:39,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502876665] [2022-12-14 07:05:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:05:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:05:39,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:05:39,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:05:39,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 07:05:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:05:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 07:05:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-14 07:05:39,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 07:05:42,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502876665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:42,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:05:42,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45, 33, 45, 33, 45] total 76 [2022-12-14 07:05:42,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892129002] [2022-12-14 07:05:42,567 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:05:42,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 07:05:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:05:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 07:05:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 07:05:42,571 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-12-14 07:05:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:05:44,749 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-12-14 07:05:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 07:05:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2022-12-14 07:05:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:05:44,750 INFO L225 Difference]: With dead ends: 64 [2022-12-14 07:05:44,750 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 07:05:44,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 452 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 07:05:44,752 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:05:44,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 734 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:05:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 07:05:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 07:05:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 07:05:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 07:05:44,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2022-12-14 07:05:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:05:44,760 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 07:05:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2022-12-14 07:05:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 07:05:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 07:05:44,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:05:44,762 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:05:44,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 07:05:44,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 07:05:45,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 07:05:45,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:45,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:05:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:05:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2022-12-14 07:05:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:05:45,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892338494] [2022-12-14 07:05:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:05:45,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:05:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:05:45,369 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:05:45,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 07:05:45,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:05:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 07:05:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-14 07:05:46,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:05:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 07:05:55,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:05:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892338494] [2022-12-14 07:05:55,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892338494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:05:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1065648756] [2022-12-14 07:05:55,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:05:55,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:05:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:05:55,769 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:05:55,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 07:05:55,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:05:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:05:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 07:05:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:05:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-14 07:05:56,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 07:06:00,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1065648756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:00,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822825562] [2022-12-14 07:06:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:06:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:06:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:06:00,043 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:06:00,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 07:06:00,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:06:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 07:06:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-14 07:06:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 07:06:04,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822825562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:04,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:06:04,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51, 37, 51, 37, 51] total 86 [2022-12-14 07:06:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439187390] [2022-12-14 07:06:04,662 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:06:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 07:06:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:06:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 07:06:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 07:06:04,667 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-12-14 07:06:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:06:08,149 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-12-14 07:06:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 07:06:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2022-12-14 07:06:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:06:08,152 INFO L225 Difference]: With dead ends: 70 [2022-12-14 07:06:08,152 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 07:06:08,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 514 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 07:06:08,155 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:06:08,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1047 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:06:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 07:06:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 07:06:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-14 07:06:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-12-14 07:06:08,160 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2022-12-14 07:06:08,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:06:08,161 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-12-14 07:06:08,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2022-12-14 07:06:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-12-14 07:06:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 07:06:08,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:06:08,162 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:06:08,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 07:06:08,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 07:06:08,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 07:06:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:06:08,763 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:06:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:06:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2022-12-14 07:06:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:06:08,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363576914] [2022-12-14 07:06:08,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:06:08,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:06:08,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:06:08,769 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:06:08,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 07:06:08,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 07:06:08,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 07:06:08,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 07:06:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 07:06:21,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:06:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363576914] [2022-12-14 07:06:21,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363576914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:21,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269045361] [2022-12-14 07:06:21,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:06:21,835 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:06:21,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:06:21,836 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:06:21,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 07:06:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 07:06:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 07:06:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 2 proven. 456 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-12-14 07:06:22,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 07:06:27,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269045361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:27,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465806958] [2022-12-14 07:06:27,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:06:27,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:06:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:06:27,425 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:06:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 07:06:27,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 07:06:27,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:27,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 07:06:27,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 07:06:27,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 07:06:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465806958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:33,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:06:33,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57, 42, 57, 41, 57] total 97 [2022-12-14 07:06:33,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271319116] [2022-12-14 07:06:33,225 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:06:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 07:06:33,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:06:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 07:06:33,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=8944, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 07:06:33,227 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 97 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 61 states have internal predecessors, (119), 21 states have call successors, (21), 1 states have call predecessors, (21), 36 states have return successors, (37), 36 states have call predecessors, (37), 21 states have call successors, (37) [2022-12-14 07:06:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:06:36,690 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-12-14 07:06:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 07:06:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 61 states have internal predecessors, (119), 21 states have call successors, (21), 1 states have call predecessors, (21), 36 states have return successors, (37), 36 states have call predecessors, (37), 21 states have call successors, (37) Word has length 113 [2022-12-14 07:06:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:06:36,692 INFO L225 Difference]: With dead ends: 76 [2022-12-14 07:06:36,692 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 07:06:36,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 575 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1330, Invalid=17030, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 07:06:36,695 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 234 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:06:36,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1101 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:06:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 07:06:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-14 07:06:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 07:06:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-12-14 07:06:36,702 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2022-12-14 07:06:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:06:36,702 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-12-14 07:06:36,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 95 states have (on average 1.2526315789473683) internal successors, (119), 61 states have internal predecessors, (119), 21 states have call successors, (21), 1 states have call predecessors, (21), 36 states have return successors, (37), 36 states have call predecessors, (37), 21 states have call successors, (37) [2022-12-14 07:06:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-12-14 07:06:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 07:06:36,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:06:36,704 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:06:36,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 07:06:36,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 07:06:37,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 07:06:37,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:06:37,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:06:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:06:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2022-12-14 07:06:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:06:37,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9525317] [2022-12-14 07:06:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:06:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:06:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:06:37,311 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:06:37,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 07:06:37,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:06:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:37,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 07:06:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 07:06:38,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 07:06:52,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:06:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9525317] [2022-12-14 07:06:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9525317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:52,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1887675920] [2022-12-14 07:06:52,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:06:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:06:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:06:52,308 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:06:52,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 07:06:52,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:06:52,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 07:06:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:06:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 07:06:52,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:06:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 07:06:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1887675920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:06:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913053139] [2022-12-14 07:06:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:06:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:06:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:06:59,710 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:06:59,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 07:06:59,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:06:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:06:59,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 07:06:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-14 07:07:00,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 07:07:06,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913053139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:06,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:07:06,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63, 45, 63, 45, 63] total 106 [2022-12-14 07:07:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106318437] [2022-12-14 07:07:06,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:07:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-12-14 07:07:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-12-14 07:07:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 07:07:06,560 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2022-12-14 07:07:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:10,513 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-12-14 07:07:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 07:07:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2022-12-14 07:07:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:10,514 INFO L225 Difference]: With dead ends: 82 [2022-12-14 07:07:10,515 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 07:07:10,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 638 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 07:07:10,517 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 804 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:10,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 1412 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 07:07:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 07:07:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-12-14 07:07:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:07:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-12-14 07:07:10,524 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2022-12-14 07:07:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:10,524 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-12-14 07:07:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2022-12-14 07:07:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-12-14 07:07:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 07:07:10,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:10,526 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:07:10,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 07:07:10,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:10,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 07:07:11,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:11,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:07:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2022-12-14 07:07:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209197700] [2022-12-14 07:07:11,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:07:11,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:11,135 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:11,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 07:07:11,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-12-14 07:07:11,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 07:07:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-12-14 07:07:12,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 07:07:29,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209197700] [2022-12-14 07:07:29,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209197700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [843438328] [2022-12-14 07:07:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:07:29,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:07:29,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:07:29,769 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:07:29,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 07:07:30,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-12-14 07:07:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:30,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 07:07:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 32 proven. 694 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-12-14 07:07:30,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 07:07:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [843438328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:38,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786670545] [2022-12-14 07:07:38,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:07:38,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:38,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:07:38,975 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:07:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 07:07:39,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-12-14 07:07:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 07:07:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-12-14 07:07:39,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 07:07:47,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786670545] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:47,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:07:47,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69, 50, 69, 49, 69] total 117 [2022-12-14 07:07:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136959170] [2022-12-14 07:07:47,051 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:07:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-12-14 07:07:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-12-14 07:07:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=13124, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 07:07:47,053 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 117 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 73 states have internal predecessors, (143), 25 states have call successors, (25), 1 states have call predecessors, (25), 44 states have return successors, (47), 44 states have call predecessors, (47), 25 states have call successors, (47) [2022-12-14 07:07:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:51,852 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-12-14 07:07:51,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 07:07:51,853 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 73 states have internal predecessors, (143), 25 states have call successors, (25), 1 states have call predecessors, (25), 44 states have return successors, (47), 44 states have call predecessors, (47), 25 states have call successors, (47) Word has length 137 [2022-12-14 07:07:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:51,854 INFO L225 Difference]: With dead ends: 88 [2022-12-14 07:07:51,854 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 07:07:51,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 699 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3708 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1798, Invalid=24934, Unknown=0, NotChecked=0, Total=26732 [2022-12-14 07:07:51,856 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 512 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 3300 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:51,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1622 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3300 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 07:07:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 07:07:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-12-14 07:07:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 07:07:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 07:07:51,859 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2022-12-14 07:07:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:51,860 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 07:07:51,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 73 states have internal predecessors, (143), 25 states have call successors, (25), 1 states have call predecessors, (25), 44 states have return successors, (47), 44 states have call predecessors, (47), 25 states have call successors, (47) [2022-12-14 07:07:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 07:07:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 07:07:51,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:51,861 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:07:51,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:52,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:52,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 07:07:52,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,463 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:07:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 12 times [2022-12-14 07:07:52,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:52,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131106523] [2022-12-14 07:07:52,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:07:52,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:52,469 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:52,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 07:07:52,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-12-14 07:07:52,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 07:07:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-12-14 07:07:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-14 07:08:13,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131106523] [2022-12-14 07:08:13,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131106523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:13,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585436126] [2022-12-14 07:08:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:08:13,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:08:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:08:13,265 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:08:13,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 07:08:13,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-12-14 07:08:13,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 07:08:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-12-14 07:08:14,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-14 07:08:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585436126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246641513] [2022-12-14 07:08:23,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:08:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:23,204 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:23,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 07:08:23,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-12-14 07:08:23,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 07:08:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-12-14 07:08:23,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-14 07:08:33,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246641513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:33,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:08:33,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75, 54, 75, 53, 75] total 127 [2022-12-14 07:08:33,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179444988] [2022-12-14 07:08:33,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:33,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-14 07:08:33,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:33,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-14 07:08:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=15514, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 07:08:33,314 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 127 states, 125 states have (on average 1.24) internal successors, (155), 79 states have internal predecessors, (155), 27 states have call successors, (27), 1 states have call predecessors, (27), 48 states have return successors, (49), 48 states have call predecessors, (49), 27 states have call successors, (49) [2022-12-14 07:08:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:39,486 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-12-14 07:08:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 07:08:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 125 states have (on average 1.24) internal successors, (155), 79 states have internal predecessors, (155), 27 states have call successors, (27), 1 states have call predecessors, (27), 48 states have return successors, (49), 48 states have call predecessors, (49), 27 states have call successors, (49) Word has length 149 [2022-12-14 07:08:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:39,487 INFO L225 Difference]: With dead ends: 94 [2022-12-14 07:08:39,487 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 07:08:39,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 761 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=2056, Invalid=29450, Unknown=0, NotChecked=0, Total=31506 [2022-12-14 07:08:39,489 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 206 mSDsluCounter, 1844 mSDsCounter, 0 mSdLazyCounter, 3490 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:39,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1875 Invalid, 3591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3490 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 07:08:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 07:08:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 07:08:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 60 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:08:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-12-14 07:08:39,493 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 149 [2022-12-14 07:08:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:39,493 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-12-14 07:08:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 125 states have (on average 1.24) internal successors, (155), 79 states have internal predecessors, (155), 27 states have call successors, (27), 1 states have call predecessors, (27), 48 states have return successors, (49), 48 states have call predecessors, (49), 27 states have call successors, (49) [2022-12-14 07:08:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-12-14 07:08:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-14 07:08:39,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:39,494 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:39,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 07:08:39,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 07:08:39,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-12-14 07:08:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:40,096 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:08:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1677247156, now seen corresponding path program 13 times [2022-12-14 07:08:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:40,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089477416] [2022-12-14 07:08:40,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:08:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:40,102 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:40,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 07:08:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 07:08:40,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-12-14 07:08:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:09:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 07:09:03,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:09:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089477416] [2022-12-14 07:09:03,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089477416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:09:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1272945762] [2022-12-14 07:09:03,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:09:03,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:09:03,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:09:03,221 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:09:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 07:09:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:09:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 07:09:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:09:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-12-14 07:09:03,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:09:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 07:09:14,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1272945762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:09:14,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495190840] [2022-12-14 07:09:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:09:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:09:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:09:14,541 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:09:14,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 07:09:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:09:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 07:09:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:09:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-12-14 07:09:15,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:09:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 07:09:25,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495190840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:09:25,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:09:25,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81, 57, 81, 57, 81] total 136 [2022-12-14 07:09:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640201519] [2022-12-14 07:09:25,352 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:09:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-12-14 07:09:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:09:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-12-14 07:09:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2022-12-14 07:09:25,356 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-12-14 07:09:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:09:31,758 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-12-14 07:09:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 07:09:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) Word has length 161 [2022-12-14 07:09:31,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:09:31,759 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:09:31,759 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 07:09:31,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1015 GetRequests, 824 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2022-12-14 07:09:31,761 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 168 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 4620 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:09:31,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 2287 Invalid, 4675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4620 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 07:09:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 07:09:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-12-14 07:09:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 28 states have return successors, (29), 28 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 07:09:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-12-14 07:09:31,764 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 161 [2022-12-14 07:09:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:09:31,764 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-12-14 07:09:31,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.2296296296296296) internal successors, (166), 84 states have internal predecessors, (166), 28 states have call successors, (28), 1 states have call predecessors, (28), 52 states have return successors, (52), 52 states have call predecessors, (52), 28 states have call successors, (52) [2022-12-14 07:09:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-12-14 07:09:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 07:09:31,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:09:31,765 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:09:31,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-12-14 07:09:31,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 07:09:32,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 07:09:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:09:32,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:09:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:09:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1199460748, now seen corresponding path program 14 times [2022-12-14 07:09:32,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:09:32,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732632681] [2022-12-14 07:09:32,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:09:32,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:09:32,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:09:32,373 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:09:32,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 07:09:32,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:09:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:09:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 07:09:32,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:09:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-12-14 07:09:34,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:09:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-14 07:09:59,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:09:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732632681] [2022-12-14 07:09:59,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732632681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:09:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464081544] [2022-12-14 07:09:59,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:09:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:09:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:09:59,889 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:09:59,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 07:10:00,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:10:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:10:00,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 07:10:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-12-14 07:10:00,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-14 07:10:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464081544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498202978] [2022-12-14 07:10:13,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:10:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:10:13,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:10:13,726 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:10:13,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 07:10:14,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:10:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:10:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 07:10:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-12-14 07:10:14,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:10:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-14 07:10:25,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498202978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:10:25,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:10:25,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87, 61, 87, 61, 87] total 146 [2022-12-14 07:10:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478277613] [2022-12-14 07:10:25,792 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:10:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-12-14 07:10:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:10:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-12-14 07:10:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 07:10:25,795 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2022-12-14 07:10:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:10:32,768 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-12-14 07:10:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 07:10:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) Word has length 173 [2022-12-14 07:10:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:10:32,769 INFO L225 Difference]: With dead ends: 106 [2022-12-14 07:10:32,769 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 07:10:32,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 886 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5686 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2022-12-14 07:10:32,772 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 586 mSDsluCounter, 2610 mSDsCounter, 0 mSdLazyCounter, 5201 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 5463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 5201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:10:32,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 2645 Invalid, 5463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 5201 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 07:10:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 07:10:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 07:10:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2022-12-14 07:10:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-12-14 07:10:32,775 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 173 [2022-12-14 07:10:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:10:32,775 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-12-14 07:10:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 90 states have internal predecessors, (178), 30 states have call successors, (30), 1 states have call predecessors, (30), 56 states have return successors, (56), 56 states have call predecessors, (56), 30 states have call successors, (56) [2022-12-14 07:10:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-12-14 07:10:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-12-14 07:10:32,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:10:32,776 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:10:32,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 07:10:33,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-12-14 07:10:33,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-12-14 07:10:33,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:10:33,379 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:10:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:10:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 15 times [2022-12-14 07:10:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:10:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15976066] [2022-12-14 07:10:33,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:10:33,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:10:33,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:10:33,383 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:10:33,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 07:10:33,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-14 07:10:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:10:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 07:10:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:10:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-12-14 07:10:35,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-14 07:11:06,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:11:06,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15976066] [2022-12-14 07:11:06,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15976066] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:06,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252830774] [2022-12-14 07:11:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:11:06,105 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:11:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:11:06,106 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:11:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 07:11:06,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-14 07:11:06,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:06,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-14 07:11:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1304 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-12-14 07:11:07,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-14 07:11:21,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252830774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424202616] [2022-12-14 07:11:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:11:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:11:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:11:21,267 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:11:21,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 07:11:21,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-14 07:11:21,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:11:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 07:11:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:11:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-12-14 07:11:22,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:11:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-14 07:11:35,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424202616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:11:35,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:11:35,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93, 66, 93, 65, 93] total 157 [2022-12-14 07:11:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042580455] [2022-12-14 07:11:35,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:11:35,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-12-14 07:11:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:11:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-12-14 07:11:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=23884, Unknown=0, NotChecked=0, Total=24492 [2022-12-14 07:11:35,688 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 157 states, 155 states have (on average 1.232258064516129) internal successors, (191), 97 states have internal predecessors, (191), 33 states have call successors, (33), 1 states have call predecessors, (33), 60 states have return successors, (61), 60 states have call predecessors, (61), 33 states have call successors, (61) [2022-12-14 07:11:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:11:44,442 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-12-14 07:11:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-14 07:11:44,443 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 155 states have (on average 1.232258064516129) internal successors, (191), 97 states have internal predecessors, (191), 33 states have call successors, (33), 1 states have call predecessors, (33), 60 states have return successors, (61), 60 states have call predecessors, (61), 33 states have call successors, (61) Word has length 185 [2022-12-14 07:11:44,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:11:44,444 INFO L225 Difference]: With dead ends: 112 [2022-12-14 07:11:44,444 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 07:11:44,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 947 SyntacticMatches, 2 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6608 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2926, Invalid=45254, Unknown=0, NotChecked=0, Total=48180 [2022-12-14 07:11:44,448 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 566 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 5832 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 6117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 5832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:11:44,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 2936 Invalid, 6117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 5832 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 07:11:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 07:11:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-12-14 07:11:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2022-12-14 07:11:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-12-14 07:11:44,453 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2022-12-14 07:11:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:11:44,454 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-12-14 07:11:44,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 155 states have (on average 1.232258064516129) internal successors, (191), 97 states have internal predecessors, (191), 33 states have call successors, (33), 1 states have call predecessors, (33), 60 states have return successors, (61), 60 states have call predecessors, (61), 33 states have call successors, (61) [2022-12-14 07:11:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-12-14 07:11:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-12-14 07:11:44,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:11:44,455 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:11:44,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 07:11:44,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 07:11:44,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-12-14 07:11:45,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:11:45,058 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:11:45,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:11:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 16 times [2022-12-14 07:11:45,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:11:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031493898] [2022-12-14 07:11:45,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:11:45,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:11:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:11:45,063 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:11:45,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 07:11:45,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:11:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 07:11:45,501 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:11:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:11:45,626 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-12-14 07:11:45,626 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:11:45,626 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 07:11:45,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-12-14 07:11:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:11:45,837 INFO L445 BasicCegarLoop]: Path program histogram: [16, 1] [2022-12-14 07:11:45,848 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 07:11:45,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:11:45 BoogieIcfgContainer [2022-12-14 07:11:45,911 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 07:11:45,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 07:11:45,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 07:11:45,912 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 07:11:45,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:04:41" (3/4) ... [2022-12-14 07:11:45,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 07:11:45,958 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fa75996-fdc4-4690-9856-76613da13565/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 07:11:45,958 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 07:11:45,959 INFO L158 Benchmark]: Toolchain (without parser) took 424579.98ms. Allocated memory was 69.2MB in the beginning and 232.8MB in the end (delta: 163.6MB). Free memory was 48.3MB in the beginning and 61.2MB in the end (delta: -13.0MB). Peak memory consumption was 153.6MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,959 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:11:45,959 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.01ms. Allocated memory is still 69.2MB. Free memory was 48.0MB in the beginning and 37.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,959 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.23ms. Allocated memory is still 69.2MB. Free memory was 37.8MB in the beginning and 36.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,959 INFO L158 Benchmark]: Boogie Preprocessor took 20.77ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 35.3MB in the end (delta: 975.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:11:45,960 INFO L158 Benchmark]: RCFGBuilder took 240.32ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 35.2MB in the beginning and 69.6MB in the end (delta: -34.4MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,960 INFO L158 Benchmark]: TraceAbstraction took 424055.65ms. Allocated memory was 90.2MB in the beginning and 232.8MB in the end (delta: 142.6MB). Free memory was 68.7MB in the beginning and 66.2MB in the end (delta: 2.4MB). Peak memory consumption was 145.5MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,960 INFO L158 Benchmark]: Witness Printer took 46.38ms. Allocated memory is still 232.8MB. Free memory was 66.2MB in the beginning and 61.2MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 07:11:45,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 47.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.01ms. Allocated memory is still 69.2MB. Free memory was 48.0MB in the beginning and 37.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.23ms. Allocated memory is still 69.2MB. Free memory was 37.8MB in the beginning and 36.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.77ms. Allocated memory is still 69.2MB. Free memory was 36.3MB in the beginning and 35.3MB in the end (delta: 975.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 240.32ms. Allocated memory was 69.2MB in the beginning and 90.2MB in the end (delta: 21.0MB). Free memory was 35.2MB in the beginning and 69.6MB in the end (delta: -34.4MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 424055.65ms. Allocated memory was 90.2MB in the beginning and 232.8MB in the end (delta: 142.6MB). Free memory was 68.7MB in the beginning and 66.2MB in the end (delta: 2.4MB). Peak memory consumption was 145.5MB. Max. memory is 16.1GB. * Witness Printer took 46.38ms. Allocated memory is still 232.8MB. Free memory was 66.2MB in the beginning and 61.2MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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) VAL [n=32] [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) VAL [hanoi(n)=-1, n=32] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<