./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 64bit --witnessprinter.graph.data.programhash 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- 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 15:12:40,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:12:40,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:12:40,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:12:40,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:12:40,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:12:40,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:12:40,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:12:40,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:12:40,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:12:40,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:12:40,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:12:40,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:12:40,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:12:40,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:12:40,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:12:40,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:12:40,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:12:40,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:12:40,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:12:40,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:12:40,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:12:40,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:12:40,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:12:40,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:12:40,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:12:40,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:12:40,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:12:40,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:12:40,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:12:40,819 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:12:40,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:12:40,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:12:40,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:12:40,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:12:40,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:12:40,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:12:40,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:12:40,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:12:40,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:12:40,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:12:40,824 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 15:12:40,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:12:40,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:12:40,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:12:40,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:12:40,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:12:40,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:12:40,840 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:12:40,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:12:40,841 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:12:40,842 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:12:40,842 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:12:40,842 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:12:40,842 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:12:40,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:12:40,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:12:40,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:12:40,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:12:40,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:12:40,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:12:40,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:12:40,844 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:12:40,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:12:40,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:12:40,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:12:40,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:12:40,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:12:40,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:12:40,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:12:40,846 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_d3773206-ce00-4dd0-9050-45a3563e097e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-12-14 15:12:41,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:12:41,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:12:41,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:12:41,051 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:12:41,051 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:12:41,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:12:43,638 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:12:43,895 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:12:43,896 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:12:43,911 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/91e8edbf1/ed9a8fb6ec6e485b88d55205827d6436/FLAG0339ab852 [2022-12-14 15:12:44,208 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/91e8edbf1/ed9a8fb6ec6e485b88d55205827d6436 [2022-12-14 15:12:44,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:12:44,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:12:44,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:12:44,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:12:44,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:12:44,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5228e583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44, skipping insertion in model container [2022-12-14 15:12:44,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:12:44,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:12:44,441 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_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-12-14 15:12:44,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:12:44,707 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:12:44,714 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_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-12-14 15:12:44,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:12:44,809 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:12:44,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44 WrapperNode [2022-12-14 15:12:44,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:12:44,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:12:44,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:12:44,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:12:44,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,919 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2431 [2022-12-14 15:12:44,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:12:44,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:12:44,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:12:44,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:12:44,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:44,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:45,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:45,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:45,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:12:45,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:12:45,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:12:45,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:12:45,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (1/1) ... [2022-12-14 15:12:45,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:12:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:45,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:12:45,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:12:45,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:12:45,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:12:45,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:12:45,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:12:45,406 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:12:45,408 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:15:29,033 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:15:29,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:15:29,060 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:15:29,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:29 BoogieIcfgContainer [2022-12-14 15:15:29,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:15:29,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:15:29,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:15:29,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:15:29,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:44" (1/3) ... [2022-12-14 15:15:29,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc08186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:29, skipping insertion in model container [2022-12-14 15:15:29,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:44" (2/3) ... [2022-12-14 15:15:29,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc08186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:29, skipping insertion in model container [2022-12-14 15:15:29,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:29" (3/3) ... [2022-12-14 15:15:29,068 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:15:29,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:15:29,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:15:29,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:15:29,120 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;@6482fcf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:15:29,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:15:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 15:15:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 15:15:29,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:29,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 15:15:29,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:29,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2051499341, now seen corresponding path program 1 times [2022-12-14 15:15:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962623494] [2022-12-14 15:15:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:15:29,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 15:15:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:15:29,400 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 15:15:29,401 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 15:15:29,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 15:15:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:15:29,407 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 15:15:29,410 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 15:15:29,429 WARN L321 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-12-14 15:15:29,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:15:29 BoogieIcfgContainer [2022-12-14 15:15:29,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 15:15:29,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 15:15:29,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 15:15:29,444 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 15:15:29,444 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:29" (3/4) ... [2022-12-14 15:15:29,447 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 15:15:29,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 15:15:29,448 INFO L158 Benchmark]: Toolchain (without parser) took 165233.86ms. Allocated memory was 109.1MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 71.2MB in the beginning and 915.5MB in the end (delta: -844.4MB). Peak memory consumption was 166.1MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,449 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:15:29,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.08ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 70.8MB in the beginning and 58.4MB in the end (delta: 12.4MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,450 INFO L158 Benchmark]: Boogie Procedure Inliner took 109.11ms. Allocated memory is still 132.1MB. Free memory was 58.4MB in the beginning and 72.0MB in the end (delta: -13.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,450 INFO L158 Benchmark]: Boogie Preprocessor took 115.63ms. Allocated memory is still 132.1MB. Free memory was 72.0MB in the beginning and 60.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,451 INFO L158 Benchmark]: RCFGBuilder took 164026.14ms. Allocated memory was 132.1MB in the beginning and 1.1GB in the end (delta: 985.7MB). Free memory was 60.8MB in the beginning and 965.9MB in the end (delta: -905.1MB). Peak memory consumption was 661.8MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,452 INFO L158 Benchmark]: TraceAbstraction took 379.66ms. Allocated memory is still 1.1GB. Free memory was 964.8MB in the beginning and 915.5MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2022-12-14 15:15:29,452 INFO L158 Benchmark]: Witness Printer took 3.89ms. Allocated memory is still 1.1GB. Free memory is still 915.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:15:29,455 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.08ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 70.8MB in the beginning and 58.4MB in the end (delta: 12.4MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 109.11ms. Allocated memory is still 132.1MB. Free memory was 58.4MB in the beginning and 72.0MB in the end (delta: -13.5MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 115.63ms. Allocated memory is still 132.1MB. Free memory was 72.0MB in the beginning and 60.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 164026.14ms. Allocated memory was 132.1MB in the beginning and 1.1GB in the end (delta: 985.7MB). Free memory was 60.8MB in the beginning and 965.9MB in the end (delta: -905.1MB). Peak memory consumption was 661.8MB. Max. memory is 16.1GB. * TraceAbstraction took 379.66ms. Allocated memory is still 1.1GB. Free memory was 964.8MB in the beginning and 915.5MB in the end (delta: 49.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Witness Printer took 3.89ms. Allocated memory is still 1.1GB. Free memory is still 915.5MB. 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: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 340, overapproximation of bitwiseAnd at line 323. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L31] const SORT_6 mask_SORT_6 = (SORT_6)-1 >> (sizeof(SORT_6) * 8 - 12); [L32] const SORT_6 msb_SORT_6 = (SORT_6)1 << (12 - 1); [L34] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 32); [L35] const SORT_11 msb_SORT_11 = (SORT_11)1 << (32 - 1); [L37] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 3); [L38] const SORT_37 msb_SORT_37 = (SORT_37)1 << (3 - 1); [L40] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 2); [L41] const SORT_44 msb_SORT_44 = (SORT_44)1 << (2 - 1); [L43] const SORT_295 mask_SORT_295 = (SORT_295)-1 >> (sizeof(SORT_295) * 8 - 4); [L44] const SORT_295 msb_SORT_295 = (SORT_295)1 << (4 - 1); [L46] const SORT_297 mask_SORT_297 = (SORT_297)-1 >> (sizeof(SORT_297) * 8 - 5); [L47] const SORT_297 msb_SORT_297 = (SORT_297)1 << (5 - 1); [L49] const SORT_299 mask_SORT_299 = (SORT_299)-1 >> (sizeof(SORT_299) * 8 - 6); [L50] const SORT_299 msb_SORT_299 = (SORT_299)1 << (6 - 1); [L52] const SORT_301 mask_SORT_301 = (SORT_301)-1 >> (sizeof(SORT_301) * 8 - 7); [L53] const SORT_301 msb_SORT_301 = (SORT_301)1 << (7 - 1); [L55] const SORT_303 mask_SORT_303 = (SORT_303)-1 >> (sizeof(SORT_303) * 8 - 8); [L56] const SORT_303 msb_SORT_303 = (SORT_303)1 << (8 - 1); [L58] const SORT_305 mask_SORT_305 = (SORT_305)-1 >> (sizeof(SORT_305) * 8 - 9); [L59] const SORT_305 msb_SORT_305 = (SORT_305)1 << (9 - 1); [L61] const SORT_307 mask_SORT_307 = (SORT_307)-1 >> (sizeof(SORT_307) * 8 - 10); [L62] const SORT_307 msb_SORT_307 = (SORT_307)1 << (10 - 1); [L64] const SORT_309 mask_SORT_309 = (SORT_309)-1 >> (sizeof(SORT_309) * 8 - 11); [L65] const SORT_309 msb_SORT_309 = (SORT_309)1 << (11 - 1); [L67] const SORT_312 mask_SORT_312 = (SORT_312)-1 >> (sizeof(SORT_312) * 8 - 13); [L68] const SORT_312 msb_SORT_312 = (SORT_312)1 << (13 - 1); [L70] const SORT_314 mask_SORT_314 = (SORT_314)-1 >> (sizeof(SORT_314) * 8 - 14); [L71] const SORT_314 msb_SORT_314 = (SORT_314)1 << (14 - 1); [L73] const SORT_316 mask_SORT_316 = (SORT_316)-1 >> (sizeof(SORT_316) * 8 - 15); [L74] const SORT_316 msb_SORT_316 = (SORT_316)1 << (15 - 1); [L76] const SORT_533 mask_SORT_533 = (SORT_533)-1 >> (sizeof(SORT_533) * 8 - 17); [L77] const SORT_533 msb_SORT_533 = (SORT_533)1 << (17 - 1); [L79] const SORT_6 var_7 = 0; [L80] const SORT_11 var_13 = 0; [L81] const SORT_3 var_21 = 0; [L82] const SORT_1 var_26 = 0; [L83] const SORT_37 var_38 = 0; [L84] const SORT_1 var_57 = 1; [L85] const SORT_37 var_93 = 2; [L86] const SORT_37 var_97 = 1; [L87] const SORT_37 var_105 = 4; [L88] const SORT_37 var_107 = 5; [L89] const SORT_37 var_111 = 3; [L90] const SORT_6 var_128 = 2; [L91] const SORT_44 var_138 = 0; [L92] const SORT_3 var_145 = 65535; [L93] const SORT_297 var_534 = 0; [L94] const SORT_301 var_626 = 5; [L95] const SORT_301 var_630 = 4; [L96] const SORT_301 var_634 = 3; [L97] const SORT_301 var_638 = 2; [L98] const SORT_301 var_642 = 1; [L99] const SORT_301 var_646 = 0; [L101] SORT_1 input_2; [L102] SORT_3 input_4; [L103] SORT_3 input_5; [L104] SORT_6 input_114; [L105] SORT_6 input_115; [L106] SORT_6 input_116; [L107] SORT_3 input_134; [L108] SORT_3 input_135; [L109] SORT_3 input_136; [L110] SORT_3 input_144; [L111] SORT_3 input_153; [L112] SORT_3 input_154; [L113] SORT_3 input_155; [L114] SORT_3 input_158; [L115] SORT_3 input_176; [L116] SORT_3 input_177; [L117] SORT_3 input_178; [L118] SORT_3 input_181; [L119] SORT_3 input_183; [L120] SORT_44 input_197; [L121] SORT_44 input_198; [L122] SORT_44 input_199; [L123] SORT_3 input_529; [L124] SORT_3 input_530; [L125] SORT_3 input_531; [L126] SORT_3 input_532; [L127] SORT_3 input_555; [L128] SORT_3 input_557; [L129] SORT_3 input_559; [L130] SORT_3 input_563; [L131] SORT_3 input_564; [L132] SORT_3 input_565; [L133] SORT_3 input_566; [L134] SORT_3 input_585; [L135] SORT_3 input_589; [L136] SORT_3 input_591; [L137] SORT_3 input_598; [L138] SORT_3 input_600; [L139] SORT_3 input_605; [L140] SORT_3 input_607; [L141] SORT_3 input_611; [L142] SORT_3 input_612; [L143] SORT_3 input_613; [L144] SORT_3 input_614; [L145] SORT_3 input_615; [L146] SORT_3 input_616; [L147] SORT_3 input_617; [L148] SORT_3 input_618; [L149] SORT_3 input_619; [L150] SORT_3 input_620; [L151] SORT_3 input_621; [L152] SORT_3 input_622; [L153] SORT_3 input_629; [L154] SORT_3 input_633; [L155] SORT_3 input_637; [L156] SORT_3 input_641; [L157] SORT_3 input_645; [L158] SORT_3 input_650; [L159] SORT_3 input_656; [L160] SORT_3 input_658; [L161] SORT_3 input_660; [L162] SORT_3 input_662; [L163] SORT_3 input_665; [L164] SORT_3 input_671; [L165] SORT_3 input_673; [L166] SORT_3 input_675; [L167] SORT_3 input_678; [L168] SORT_3 input_684; [L169] SORT_3 input_686; [L170] SORT_3 input_689; [L171] SORT_3 input_695; [L172] SORT_3 input_698; [L173] SORT_3 input_705; [L174] SORT_3 input_710; [L175] SORT_1 input_729; [L176] SORT_1 input_730; [L177] SORT_1 input_731; [L178] SORT_1 input_732; [L179] SORT_1 input_735; [L180] SORT_1 input_737; [L181] SORT_1 input_739; [L182] SORT_1 input_744; [L183] SORT_1 input_746; [L184] SORT_1 input_751; [L185] SORT_3 input_764; [L186] SORT_3 input_765; [L187] SORT_3 input_766; [L189] SORT_6 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L190] SORT_6 state_15 = __VERIFIER_nondet_ushort() & mask_SORT_6; [L191] SORT_3 state_22 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L192] SORT_3 state_24 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L193] SORT_3 state_28 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L194] SORT_3 state_30 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L195] SORT_37 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_37; [L196] SORT_3 state_80 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L197] SORT_3 state_82 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L198] SORT_3 state_84 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L199] SORT_1 state_86 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L200] SORT_3 state_88 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L201] SORT_3 state_90 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L203] SORT_6 init_9_arg_1 = var_7; [L204] state_8 = init_9_arg_1 [L205] SORT_6 init_16_arg_1 = var_7; [L206] state_15 = init_16_arg_1 [L207] SORT_3 init_23_arg_1 = var_21; [L208] state_22 = init_23_arg_1 [L209] SORT_3 init_25_arg_1 = var_21; [L210] state_24 = init_25_arg_1 [L211] SORT_3 init_29_arg_1 = var_21; [L212] state_28 = init_29_arg_1 [L213] SORT_3 init_31_arg_1 = var_21; [L214] state_30 = init_31_arg_1 [L215] SORT_37 init_40_arg_1 = var_38; [L216] state_39 = init_40_arg_1 [L217] SORT_3 init_81_arg_1 = var_21; [L218] state_80 = init_81_arg_1 [L219] SORT_3 init_83_arg_1 = var_21; [L220] state_82 = init_83_arg_1 [L221] SORT_3 init_85_arg_1 = var_21; [L222] state_84 = init_85_arg_1 [L223] SORT_1 init_87_arg_1 = var_26; [L224] state_86 = init_87_arg_1 [L225] SORT_3 init_89_arg_1 = var_21; [L226] state_88 = init_89_arg_1 [L227] SORT_3 init_91_arg_1 = var_21; [L228] state_90 = init_91_arg_1 VAL [init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_105=4, var_107=5, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_21=0, var_26=0, var_38=0, var_534=0, var_57=1, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L231] input_2 = __VERIFIER_nondet_uchar() [L232] input_4 = __VERIFIER_nondet_ushort() [L233] input_5 = __VERIFIER_nondet_ushort() [L234] input_114 = __VERIFIER_nondet_ushort() [L235] input_115 = __VERIFIER_nondet_ushort() [L236] input_116 = __VERIFIER_nondet_ushort() [L237] input_134 = __VERIFIER_nondet_ushort() [L238] input_135 = __VERIFIER_nondet_ushort() [L239] input_136 = __VERIFIER_nondet_ushort() [L240] input_144 = __VERIFIER_nondet_ushort() [L241] input_153 = __VERIFIER_nondet_ushort() [L242] input_154 = __VERIFIER_nondet_ushort() [L243] input_155 = __VERIFIER_nondet_ushort() [L244] input_158 = __VERIFIER_nondet_ushort() [L245] input_176 = __VERIFIER_nondet_ushort() [L246] input_177 = __VERIFIER_nondet_ushort() [L247] input_178 = __VERIFIER_nondet_ushort() [L248] input_181 = __VERIFIER_nondet_ushort() [L249] input_183 = __VERIFIER_nondet_ushort() [L250] input_197 = __VERIFIER_nondet_uchar() [L251] input_198 = __VERIFIER_nondet_uchar() [L252] input_199 = __VERIFIER_nondet_uchar() [L253] input_529 = __VERIFIER_nondet_ushort() [L254] input_530 = __VERIFIER_nondet_ushort() [L255] input_531 = __VERIFIER_nondet_ushort() [L256] input_532 = __VERIFIER_nondet_ushort() [L257] input_555 = __VERIFIER_nondet_ushort() [L258] input_557 = __VERIFIER_nondet_ushort() [L259] input_559 = __VERIFIER_nondet_ushort() [L260] input_563 = __VERIFIER_nondet_ushort() [L261] input_564 = __VERIFIER_nondet_ushort() [L262] input_565 = __VERIFIER_nondet_ushort() [L263] input_566 = __VERIFIER_nondet_ushort() [L264] input_585 = __VERIFIER_nondet_ushort() [L265] input_589 = __VERIFIER_nondet_ushort() [L266] input_591 = __VERIFIER_nondet_ushort() [L267] input_598 = __VERIFIER_nondet_ushort() [L268] input_600 = __VERIFIER_nondet_ushort() [L269] input_605 = __VERIFIER_nondet_ushort() [L270] input_607 = __VERIFIER_nondet_ushort() [L271] input_611 = __VERIFIER_nondet_ushort() [L272] input_612 = __VERIFIER_nondet_ushort() [L273] input_613 = __VERIFIER_nondet_ushort() [L274] input_614 = __VERIFIER_nondet_ushort() [L275] input_615 = __VERIFIER_nondet_ushort() [L276] input_616 = __VERIFIER_nondet_ushort() [L277] input_617 = __VERIFIER_nondet_ushort() [L278] input_618 = __VERIFIER_nondet_ushort() [L279] input_619 = __VERIFIER_nondet_ushort() [L280] input_620 = __VERIFIER_nondet_ushort() [L281] input_621 = __VERIFIER_nondet_ushort() [L282] input_622 = __VERIFIER_nondet_ushort() [L283] input_629 = __VERIFIER_nondet_ushort() [L284] input_633 = __VERIFIER_nondet_ushort() [L285] input_637 = __VERIFIER_nondet_ushort() [L286] input_641 = __VERIFIER_nondet_ushort() [L287] input_645 = __VERIFIER_nondet_ushort() [L288] input_650 = __VERIFIER_nondet_ushort() [L289] input_656 = __VERIFIER_nondet_ushort() [L290] input_658 = __VERIFIER_nondet_ushort() [L291] input_660 = __VERIFIER_nondet_ushort() [L292] input_662 = __VERIFIER_nondet_ushort() [L293] input_665 = __VERIFIER_nondet_ushort() [L294] input_671 = __VERIFIER_nondet_ushort() [L295] input_673 = __VERIFIER_nondet_ushort() [L296] input_675 = __VERIFIER_nondet_ushort() [L297] input_678 = __VERIFIER_nondet_ushort() [L298] input_684 = __VERIFIER_nondet_ushort() [L299] input_686 = __VERIFIER_nondet_ushort() [L300] input_689 = __VERIFIER_nondet_ushort() [L301] input_695 = __VERIFIER_nondet_ushort() [L302] input_698 = __VERIFIER_nondet_ushort() [L303] input_705 = __VERIFIER_nondet_ushort() [L304] input_710 = __VERIFIER_nondet_ushort() [L305] input_729 = __VERIFIER_nondet_uchar() [L306] input_730 = __VERIFIER_nondet_uchar() [L307] input_731 = __VERIFIER_nondet_uchar() [L308] input_732 = __VERIFIER_nondet_uchar() [L309] input_735 = __VERIFIER_nondet_uchar() [L310] input_737 = __VERIFIER_nondet_uchar() [L311] input_739 = __VERIFIER_nondet_uchar() [L312] input_744 = __VERIFIER_nondet_uchar() [L313] input_746 = __VERIFIER_nondet_uchar() [L314] input_751 = __VERIFIER_nondet_uchar() [L315] input_764 = __VERIFIER_nondet_ushort() [L316] input_765 = __VERIFIER_nondet_ushort() [L317] input_766 = __VERIFIER_nondet_ushort() [L320] SORT_6 var_10_arg_0 = state_8; [L321] SORT_1 var_10 = var_10_arg_0 >> 0; [L322] SORT_1 var_52_arg_0 = var_10; [L323] var_52_arg_0 = var_52_arg_0 & mask_SORT_1 [L324] SORT_11 var_52 = var_52_arg_0; [L325] SORT_11 var_53_arg_0 = var_52; [L326] SORT_11 var_53_arg_1 = var_13; [L327] SORT_1 var_53 = var_53_arg_0 == var_53_arg_1; [L328] SORT_6 var_17_arg_0 = state_15; [L329] SORT_1 var_17 = var_17_arg_0 >> 0; [L330] SORT_1 var_54_arg_0 = var_17; [L331] var_54_arg_0 = var_54_arg_0 & mask_SORT_1 [L332] SORT_11 var_54 = var_54_arg_0; [L333] SORT_11 var_55_arg_0 = var_54; [L334] SORT_11 var_55_arg_1 = var_13; [L335] SORT_1 var_55 = var_55_arg_0 == var_55_arg_1; [L336] SORT_1 var_56_arg_0 = var_53; [L337] SORT_1 var_56_arg_1 = var_55; [L338] SORT_1 var_56 = var_56_arg_0 & var_56_arg_1; [L339] SORT_1 var_58_arg_0 = var_56; [L340] SORT_1 var_58 = ~var_58_arg_0; [L341] SORT_1 var_59_arg_0 = var_57; [L342] SORT_1 var_59_arg_1 = var_58; [L343] SORT_1 var_59 = var_59_arg_0 & var_59_arg_1; [L344] var_59 = var_59 & mask_SORT_1 [L345] SORT_1 bad_60_arg_0 = var_59; VAL [bad_60_arg_0=1, init_16_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_40_arg_1=0, init_81_arg_1=0, init_83_arg_1=0, init_85_arg_1=0, init_87_arg_1=0, init_89_arg_1=0, init_91_arg_1=0, init_9_arg_1=0, input_114=39, input_115=43, input_116=68, input_134=76, input_135=53, input_136=9, input_144=75, input_153=17, input_154=54, input_155=60, input_158=83, input_176=80, input_177=62, input_178=64, input_181=82, input_183=18, input_197=27, input_198=74, input_199=45, input_2=31, input_4=2, input_5=72, input_529=85, input_530=35, input_531=40, input_532=59, input_555=47, input_557=16, input_559=12, input_563=8, input_564=52, input_565=41, input_566=44, input_585=3, input_589=29, input_591=5, input_598=34, input_600=19, input_605=84, input_607=46, input_611=25, input_612=37, input_613=48, input_614=78, input_615=50, input_616=38, input_617=15, input_618=36, input_619=81, input_620=66, input_621=20, input_622=7, input_629=26, input_633=86, input_637=23, input_641=67, input_645=14, input_650=87, input_656=58, input_658=22, input_660=73, input_662=61, input_665=56, input_671=49, input_673=6, input_675=51, input_678=65, input_684=32, input_686=1, input_689=69, input_695=28, input_698=70, input_705=11, input_710=63, input_729=55, input_730=21, input_731=79, input_732=33, input_735=4, input_737=77, input_739=24, input_744=57, input_746=42, input_751=10, input_764=30, input_765=71, input_766=13, mask_SORT_1=1, mask_SORT_11=4294967295, mask_SORT_295=15, mask_SORT_297=31, mask_SORT_299=63, mask_SORT_3=65535, mask_SORT_301=127, mask_SORT_303=255, mask_SORT_305=511, mask_SORT_307=1023, mask_SORT_309=2047, mask_SORT_312=8191, mask_SORT_314=16383, mask_SORT_316=32767, mask_SORT_37=7, mask_SORT_44=3, mask_SORT_533=4294967295, mask_SORT_6=4095, msb_SORT_1=1, msb_SORT_11=2147483648, msb_SORT_295=8, msb_SORT_297=16, msb_SORT_299=32, msb_SORT_3=32768, msb_SORT_301=64, msb_SORT_303=128, msb_SORT_305=256, msb_SORT_307=512, msb_SORT_309=1024, msb_SORT_312=4096, msb_SORT_314=8192, msb_SORT_316=16384, msb_SORT_37=4, msb_SORT_44=2, msb_SORT_533=65536, msb_SORT_6=2048, state_15=0, state_22=0, state_24=0, state_28=0, state_30=0, state_39=0, state_8=0, state_80=0, state_82=0, state_84=0, state_86=0, state_88=0, state_90=0, var_10=0, var_105=4, var_107=5, var_10_arg_0=0, var_111=3, var_128=2, var_13=0, var_138=0, var_145=65535, var_17=0, var_17_arg_0=0, var_21=0, var_26=0, var_38=0, var_52=0, var_52_arg_0=0, var_53=1, var_534=0, var_53_arg_0=0, var_53_arg_1=0, var_54=0, var_54_arg_0=0, var_55=1, var_55_arg_0=0, var_55_arg_1=0, var_56=1, var_56_arg_0=1, var_56_arg_1=1, var_57=1, var_58=2, var_58_arg_0=1, var_59=1, var_59_arg_0=1, var_59_arg_1=2, var_626=5, var_630=4, var_634=3, var_638=2, var_642=1, var_646=0, var_7=0, var_93=2, var_97=1] [L346] CALL __VERIFIER_assert(!(bad_60_arg_0)) VAL [\old(cond)=0] [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 15:15:29,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 64bit --witnessprinter.graph.data.programhash 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 --- 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 15:15:31,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:15:31,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:15:31,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:15:31,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:15:31,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:15:31,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:15:31,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:15:31,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:15:31,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:15:31,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:15:31,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:15:31,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:15:31,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:15:31,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:15:31,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:15:31,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:15:31,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:15:31,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:15:31,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:15:31,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:15:31,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:15:31,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:15:31,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:15:31,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:15:31,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:15:31,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:15:31,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:15:31,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:15:31,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:15:31,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:15:31,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:15:31,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:15:31,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:15:31,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:15:31,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:15:31,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:15:31,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:15:31,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:15:31,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:15:31,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:15:31,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-12-14 15:15:31,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:15:31,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:15:31,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:15:31,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:15:31,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:15:31,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:15:31,282 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:15:31,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 15:15:31,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:15:31,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:15:31,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:15:31,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 15:15:31,285 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 204d10239a0b36d2351863a85d337d8394fa6f65e7ffe92c9fae442e87993f63 [2022-12-14 15:15:31,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:15:31,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:15:31,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:15:31,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:15:31,539 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:15:31,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:15:34,183 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:15:34,466 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:15:34,467 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:15:34,483 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/903d6bd41/43f8a165f11045f3881a2f04c45045dc/FLAGe6d71ca54 [2022-12-14 15:15:34,497 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/data/903d6bd41/43f8a165f11045f3881a2f04c45045dc [2022-12-14 15:15:34,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:15:34,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:15:34,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:15:34,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:15:34,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:15:34,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:34" (1/1) ... [2022-12-14 15:15:34,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34cc1f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:34, skipping insertion in model container [2022-12-14 15:15:34,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:34" (1/1) ... [2022-12-14 15:15:34,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:15:34,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:15:34,697 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_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-12-14 15:15:34,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:15:34,962 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:15:34,972 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_d3773206-ce00-4dd0-9050-45a3563e097e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_Vsa16.c[1107,1120] [2022-12-14 15:15:35,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:15:35,092 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:15:35,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35 WrapperNode [2022-12-14 15:15:35,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:15:35,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:15:35,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:15:35,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:15:35,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,221 INFO L138 Inliner]: procedures = 11, calls = 6, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2431 [2022-12-14 15:15:35,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:15:35,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:15:35,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:15:35,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:15:35,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,296 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:15:35,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:15:35,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:15:35,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:15:35,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 15:15:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:15:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:15:35,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:15:35,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:15:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:15:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:15:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:15:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:15:35,748 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:15:35,750 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:15:38,020 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:15:38,027 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:15:38,027 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:15:38,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:38 BoogieIcfgContainer [2022-12-14 15:15:38,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:15:38,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:15:38,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:15:38,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:15:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:15:34" (1/3) ... [2022-12-14 15:15:38,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5814cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:38, skipping insertion in model container [2022-12-14 15:15:38,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (2/3) ... [2022-12-14 15:15:38,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5814cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:38, skipping insertion in model container [2022-12-14 15:15:38,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:38" (3/3) ... [2022-12-14 15:15:38,037 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_Vsa16.c [2022-12-14 15:15:38,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:15:38,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:15:38,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:15:38,098 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;@7b89b1ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:15:38,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:15:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 15:15:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:15:38,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:38,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:38,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1810462814, now seen corresponding path program 1 times [2022-12-14 15:15:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536777250] [2022-12-14 15:15:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:38,125 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 15:15:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:38,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:38,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:38,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 15:15:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:38,672 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 15:15:38,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:15:38,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536777250] [2022-12-14 15:15:38,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536777250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:38,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:38,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:15:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888428470] [2022-12-14 15:15:38,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:38,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:15:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:15:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:15:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:15:38,706 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:15:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:39,140 INFO L93 Difference]: Finished difference Result 50 states and 77 transitions. [2022-12-14 15:15:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:15:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 15:15:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:39,147 INFO L225 Difference]: With dead ends: 50 [2022-12-14 15:15:39,147 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 15:15:39,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:15:39,152 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:39,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 72 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:15:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 15:15:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-12-14 15:15:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 15:15:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-14 15:15:39,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2022-12-14 15:15:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:39,184 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-14 15:15:39,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:15:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-14 15:15:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 15:15:39,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:39,186 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:39,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:39,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash -995691336, now seen corresponding path program 1 times [2022-12-14 15:15:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157754155] [2022-12-14 15:15:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:39,393 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 15:15:39,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:39,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:39,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:39,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:15:39,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:15:39,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:15:39,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:39,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157754155] [2022-12-14 15:15:39,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157754155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:39,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:39,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:15:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128811485] [2022-12-14 15:15:39,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:15:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:15:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:15:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:15:39,859 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:15:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:40,417 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-12-14 15:15:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:15:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 15:15:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:40,419 INFO L225 Difference]: With dead ends: 39 [2022-12-14 15:15:40,419 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 15:15:40,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:15:40,421 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:40,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 92 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:15:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 15:15:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-12-14 15:15:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 15:15:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-14 15:15:40,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 13 [2022-12-14 15:15:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:40,430 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-14 15:15:40,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:15:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-14 15:15:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:15:40,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:40,431 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:40,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Ended with exit code 0 [2022-12-14 15:15:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:40,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:40,634 INFO L85 PathProgramCache]: Analyzing trace with hash -53539184, now seen corresponding path program 1 times [2022-12-14 15:15:40,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:40,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488383300] [2022-12-14 15:15:40,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:40,637 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 15:15:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:40,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:40,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Waiting until timeout for monitored process [2022-12-14 15:15:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:15:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:15:41,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:15:41,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488383300] [2022-12-14 15:15:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488383300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:41,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:41,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:15:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82130873] [2022-12-14 15:15:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:15:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:15:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:15:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:15:41,030 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:15:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:41,428 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-12-14 15:15:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:15:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-12-14 15:15:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:41,430 INFO L225 Difference]: With dead ends: 45 [2022-12-14 15:15:41,430 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 15:15:41,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:15:41,431 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:41,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:15:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 15:15:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-12-14 15:15:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 15:15:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-12-14 15:15:41,438 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2022-12-14 15:15:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:41,438 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-12-14 15:15:41,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:15:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-12-14 15:15:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 15:15:41,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:41,439 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:41,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Ended with exit code 0 [2022-12-14 15:15:41,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:41,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1735839898, now seen corresponding path program 1 times [2022-12-14 15:15:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:41,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627210224] [2022-12-14 15:15:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:41,648 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 15:15:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:41,653 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:41,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 (5)] Waiting until timeout for monitored process [2022-12-14 15:15:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 15:15:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:15:42,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:15:42,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:42,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627210224] [2022-12-14 15:15:42,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627210224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:42,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:42,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:15:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955280050] [2022-12-14 15:15:42,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:42,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:15:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:15:42,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:15:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:15:42,241 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:15:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:42,694 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-12-14 15:15:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:15:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-14 15:15:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:42,696 INFO L225 Difference]: With dead ends: 51 [2022-12-14 15:15:42,696 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 15:15:42,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:15:42,697 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:42,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 154 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:15:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 15:15:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-12-14 15:15:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 15:15:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-12-14 15:15:42,706 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2022-12-14 15:15:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:42,706 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-12-14 15:15:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 15:15:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-12-14 15:15:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 15:15:42,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:42,707 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:42,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 (5)] Ended with exit code 0 [2022-12-14 15:15:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:42,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2127961366, now seen corresponding path program 1 times [2022-12-14 15:15:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733383386] [2022-12-14 15:15:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:42,922 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 15:15:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:42,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:42,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:43,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 15:15:43,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:15:43,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:44,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733383386] [2022-12-14 15:15:44,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733383386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80239241] [2022-12-14 15:15:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:44,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:15:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:15:44,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:15:44,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 15:15:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 15:15:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:15:46,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80239241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:47,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414665071] [2022-12-14 15:15:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:47,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:47,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:15:47,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:15:47,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:15:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 15:15:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:15:48,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414665071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:48,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:15:48,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-12-14 15:15:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458899699] [2022-12-14 15:15:48,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:15:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 15:15:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:15:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 15:15:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:15:48,687 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:15:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:49,649 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-12-14 15:15:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:15:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 32 [2022-12-14 15:15:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:49,650 INFO L225 Difference]: With dead ends: 57 [2022-12-14 15:15:49,651 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 15:15:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:15:49,651 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 39 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:15:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 15:15:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-12-14 15:15:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 15:15:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-12-14 15:15:49,658 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 32 [2022-12-14 15:15:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:49,659 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-12-14 15:15:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 15:15:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-12-14 15:15:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 15:15:49,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:49,660 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:15:49,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Ended with exit code 0 [2022-12-14 15:15:49,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 15:15:50,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:15:50,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:50,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:50,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2047029104, now seen corresponding path program 2 times [2022-12-14 15:15:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:15:50,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153559495] [2022-12-14 15:15:50,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:15:50,267 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 15:15:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:15:50,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:15:50,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:15:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:15:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 259 conjunts are in the unsatisfiable core [2022-12-14 15:15:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:15:53,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:53,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:15:53,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153559495] [2022-12-14 15:15:53,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153559495] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:53,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990632238] [2022-12-14 15:15:53,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:15:53,591 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:15:53,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:15:53,592 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:15:53,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 15:15:55,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:15:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:15:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 262 conjunts are in the unsatisfiable core [2022-12-14 15:15:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 15:15:57,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:57,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990632238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051281024] [2022-12-14 15:15:57,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:15:57,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:57,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:15:57,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:15:57,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:15:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:15:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:15:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 262 conjunts are in the unsatisfiable core [2022-12-14 15:15:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 15:16:00,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:00,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051281024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:00,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:00,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 10 [2022-12-14 15:16:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348510195] [2022-12-14 15:16:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:16:00,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 15:16:00,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:16:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 15:16:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:16:00,688 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:16:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:01,543 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-12-14 15:16:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:16:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-12-14 15:16:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:01,544 INFO L225 Difference]: With dead ends: 61 [2022-12-14 15:16:01,544 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:16:01,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:16:01,545 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:01,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:16:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:16:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-12-14 15:16:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 15:16:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-12-14 15:16:01,558 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 38 [2022-12-14 15:16:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:01,559 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-12-14 15:16:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:16:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-12-14 15:16:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 15:16:01,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:01,560 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:01,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Ended with exit code 0 [2022-12-14 15:16:01,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-12-14 15:16:01,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:16:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:02,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1813143368, now seen corresponding path program 3 times [2022-12-14 15:16:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:16:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935202505] [2022-12-14 15:16:02,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:16:02,174 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 15:16:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:16:02,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:02,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:02,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:16:02,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 15:16:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:16:03,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:03,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:16:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935202505] [2022-12-14 15:16:03,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935202505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:03,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1562546407] [2022-12-14 15:16:03,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:16:03,292 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:03,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:16:03,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:16:03,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 15:16:04,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:16:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 15:16:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:16:04,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:04,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1562546407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:04,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408383410] [2022-12-14 15:16:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:16:04,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:04,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:04,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:04,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:16:05,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:16:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 15:16:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:16:05,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:05,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408383410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:05,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:05,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-12-14 15:16:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88730970] [2022-12-14 15:16:05,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:16:05,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:16:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:16:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:16:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:16:05,782 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:16:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:06,558 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-12-14 15:16:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:16:06,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-12-14 15:16:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:06,560 INFO L225 Difference]: With dead ends: 70 [2022-12-14 15:16:06,560 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 15:16:06,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:16:06,561 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:06,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 15:16:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 15:16:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-12-14 15:16:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 15:16:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-12-14 15:16:06,571 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2022-12-14 15:16:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-12-14 15:16:06,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 15:16:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-12-14 15:16:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 15:16:06,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:06,572 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 15:16:06,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:06,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:16:07,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:16:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:07,174 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1099634206, now seen corresponding path program 4 times [2022-12-14 15:16:07,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:16:07,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737542213] [2022-12-14 15:16:07,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:16:07,179 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 15:16:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:16:07,180 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:07,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:07,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:16:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 327 conjunts are in the unsatisfiable core [2022-12-14 15:16:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:16:10,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:12,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:16:12,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737542213] [2022-12-14 15:16:12,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737542213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:12,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240807485] [2022-12-14 15:16:12,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:16:12,123 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:12,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:16:12,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:16:12,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 15:16:13,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:16:13,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 333 conjunts are in the unsatisfiable core [2022-12-14 15:16:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:16:16,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240807485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767173059] [2022-12-14 15:16:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:16:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:17,229 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:17,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:16:17,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:16:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2318 conjuncts, 141 conjunts are in the unsatisfiable core [2022-12-14 15:16:17,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 37 proven. 21 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 15:16:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:22,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767173059] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:22,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:22,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 15] total 20 [2022-12-14 15:16:22,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720102369] [2022-12-14 15:16:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:16:22,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 15:16:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:16:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 15:16:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:16:22,108 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 15:16:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:26,934 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-12-14 15:16:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 15:16:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-12-14 15:16:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:26,945 INFO L225 Difference]: With dead ends: 70 [2022-12-14 15:16:26,945 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 15:16:26,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 15:16:26,946 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:26,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 87 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 15:16:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 15:16:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-12-14 15:16:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 15:16:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-12-14 15:16:26,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 50 [2022-12-14 15:16:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:26,966 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-12-14 15:16:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 15:16:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-12-14 15:16:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 15:16:26,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:26,967 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 15:16:26,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Ended with exit code 0 [2022-12-14 15:16:27,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:16:27,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-12-14 15:16:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:27,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash -623003810, now seen corresponding path program 5 times [2022-12-14 15:16:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:16:27,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815492525] [2022-12-14 15:16:27,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:16:27,575 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 15:16:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:16:27,576 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:27,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:28,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 15:16:28,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 15:16:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 15:16:30,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:31,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:16:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815492525] [2022-12-14 15:16:31,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815492525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13878972] [2022-12-14 15:16:31,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:16:31,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:31,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:16:31,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:16:31,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 15:16:34,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 15:16:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-14 15:16:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 15:16:35,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:36,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13878972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768857535] [2022-12-14 15:16:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:16:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:36,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:36,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:16:38,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 15:16:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:38,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 4190 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-14 15:16:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 15:16:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:40,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768857535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:40,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:40,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 13] total 25 [2022-12-14 15:16:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788938566] [2022-12-14 15:16:40,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:16:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:16:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:16:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:16:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-12-14 15:16:40,313 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 15:16:43,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:16:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:44,057 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-12-14 15:16:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:16:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) Word has length 57 [2022-12-14 15:16:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:44,058 INFO L225 Difference]: With dead ends: 82 [2022-12-14 15:16:44,058 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 15:16:44,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:16:44,059 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:44,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 15:16:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 15:16:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-12-14 15:16:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 15:16:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-12-14 15:16:44,075 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 57 [2022-12-14 15:16:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:44,075 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-12-14 15:16:44,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 22 states have internal predecessors, (46), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 10 states have call successors, (24) [2022-12-14 15:16:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-12-14 15:16:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 15:16:44,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:44,076 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 15:16:44,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:44,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 15:16:44,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 15:16:44,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:44,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash -718277704, now seen corresponding path program 6 times [2022-12-14 15:16:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:16:44,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533618759] [2022-12-14 15:16:44,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:16:44,690 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 15:16:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:16:44,690 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:44,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:16:45,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-14 15:16:45,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 374 conjunts are in the unsatisfiable core [2022-12-14 15:16:45,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-12-14 15:16:53,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:53,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:16:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533618759] [2022-12-14 15:16:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533618759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113608504] [2022-12-14 15:16:53,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:16:53,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:16:53,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:16:53,668 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:16:53,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 15:16:55,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-14 15:16:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:16:55,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 445 conjunts are in the unsatisfiable core [2022-12-14 15:16:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 15:17:06,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:06,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113608504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:06,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039163378] [2022-12-14 15:17:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:17:06,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:06,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:06,888 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:06,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 15:17:07,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-14 15:17:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:17:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2194 conjuncts, 382 conjunts are in the unsatisfiable core [2022-12-14 15:17:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-12-14 15:17:15,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039163378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:15,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:17:15,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 21 [2022-12-14 15:17:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139641772] [2022-12-14 15:17:15,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:17:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 15:17:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:17:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 15:17:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:17:15,549 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 15:17:17,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:17:20,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:17:22,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:17:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:22,709 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-12-14 15:17:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:17:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 63 [2022-12-14 15:17:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:22,711 INFO L225 Difference]: With dead ends: 79 [2022-12-14 15:17:22,711 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 15:17:22,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-12-14 15:17:22,712 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 52 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:22,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 88 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 15:17:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 15:17:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 15:17:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 15:17:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-12-14 15:17:22,732 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 63 [2022-12-14 15:17:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:22,732 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-12-14 15:17:22,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 3.0) internal successors, (45), 20 states have internal predecessors, (45), 14 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 15:17:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-12-14 15:17:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 15:17:22,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:22,733 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 15:17:22,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:22,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 15:17:23,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 15:17:23,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:23,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -597897840, now seen corresponding path program 7 times [2022-12-14 15:17:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:17:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443327761] [2022-12-14 15:17:23,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:17:23,341 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 15:17:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:17:23,341 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 15:17:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 15:17:24,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:25,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:17:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443327761] [2022-12-14 15:17:25,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443327761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2077028878] [2022-12-14 15:17:25,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:17:25,127 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:17:25,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:17:25,128 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:17:25,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 15:17:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 15:17:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 15:17:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:28,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2077028878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150048286] [2022-12-14 15:17:28,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:17:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:28,366 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 15:17:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 4250 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 15:17:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 15:17:29,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:29,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150048286] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:29,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:17:29,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 13 [2022-12-14 15:17:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127471577] [2022-12-14 15:17:29,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:17:29,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:17:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:17:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:17:29,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:17:29,740 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 15:17:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:31,329 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2022-12-14 15:17:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:17:31,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 69 [2022-12-14 15:17:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:31,331 INFO L225 Difference]: With dead ends: 90 [2022-12-14 15:17:31,331 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 15:17:31,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 205 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-12-14 15:17:31,332 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:31,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 15:17:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 15:17:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-12-14 15:17:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 15 states have call successors, (15), 12 states have call predecessors, (15), 12 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 15:17:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-12-14 15:17:31,353 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 69 [2022-12-14 15:17:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:31,354 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-12-14 15:17:31,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 15:17:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-12-14 15:17:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 15:17:31,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:31,354 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 15:17:31,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 15:17:31,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 15:17:31,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:31,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1601458586, now seen corresponding path program 8 times [2022-12-14 15:17:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:17:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901649379] [2022-12-14 15:17:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:17:31,968 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 15:17:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:17:31,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:31,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:17:33,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:17:33,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:17:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 571 conjunts are in the unsatisfiable core [2022-12-14 15:17:33,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:17:41,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:42,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:17:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901649379] [2022-12-14 15:17:42,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901649379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2019485658] [2022-12-14 15:17:42,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:17:42,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:17:42,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:17:42,634 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:17:42,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 15:17:45,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:17:45,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:17:45,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 578 conjunts are in the unsatisfiable core [2022-12-14 15:17:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 15:17:53,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:54,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2019485658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808810462] [2022-12-14 15:17:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 15:17:54,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:54,673 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:54,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 15:17:55,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 15:17:55,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:17:55,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-14 15:17:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 89 proven. 31 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-12-14 15:17:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:00,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808810462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:00,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:18:00,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 14] total 20 [2022-12-14 15:18:00,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080108129] [2022-12-14 15:18:00,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:18:00,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 15:18:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:18:00,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 15:18:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:18:00,235 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-12-14 15:18:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:05,823 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-12-14 15:18:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 15:18:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 75 [2022-12-14 15:18:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:05,825 INFO L225 Difference]: With dead ends: 98 [2022-12-14 15:18:05,825 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 15:18:05,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 15:18:05,827 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:05,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 86 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 15:18:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 15:18:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-12-14 15:18:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 64 states have internal predecessors, (64), 15 states have call successors, (15), 14 states have call predecessors, (15), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 15:18:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-12-14 15:18:05,851 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 75 [2022-12-14 15:18:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:05,852 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-12-14 15:18:05,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.4) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-12-14 15:18:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-12-14 15:18:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 15:18:05,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:05,852 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 15:18:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-12-14 15:18:06,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 15:18:06,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:18:06,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:18:06,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2049524202, now seen corresponding path program 9 times [2022-12-14 15:18:06,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:18:06,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418864952] [2022-12-14 15:18:06,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:18:06,470 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 15:18:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:18:06,473 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:18:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:18:08,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 15:18:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:18:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 100 conjunts are in the unsatisfiable core [2022-12-14 15:18:08,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 15:18:10,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:10,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:18:10,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418864952] [2022-12-14 15:18:10,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418864952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:10,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [893003482] [2022-12-14 15:18:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:18:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:18:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:18:10,934 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:18:10,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 15:18:15,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 15:18:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:18:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 15:18:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-12-14 15:18:17,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:18,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [893003482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:18,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952934027] [2022-12-14 15:18:18,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:18:18,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:18,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:18,367 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:18,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 15:18:20,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 15:18:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:18:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 6092 conjuncts, 299 conjunts are in the unsatisfiable core [2022-12-14 15:18:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 56 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 15:18:42,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952934027] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:44,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:18:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 14] total 25 [2022-12-14 15:18:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494648977] [2022-12-14 15:18:44,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:18:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:18:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:18:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:18:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-12-14 15:18:44,594 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-12-14 15:18:52,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:18:54,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:18:56,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:02,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:09,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:11,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:13,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:15,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:17,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:19,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:22,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:24,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:26,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:36,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:38,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:19:40,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:04,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:16,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:18,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:20,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:22,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:24,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:26,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:28,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:30,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:32,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:41,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:43,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:20:45,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:24,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:38,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:41,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:43,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:21:54,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:22:06,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:22:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:07,903 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2022-12-14 15:22:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 15:22:07,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 82 [2022-12-14 15:22:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:07,904 INFO L225 Difference]: With dead ends: 138 [2022-12-14 15:22:07,904 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 15:22:07,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 135.6s TimeCoverageRelationStatistics Valid=459, Invalid=2357, Unknown=46, NotChecked=0, Total=2862 [2022-12-14 15:22:07,906 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 102 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 127 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:07,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 158 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 752 Invalid, 34 Unknown, 0 Unchecked, 77.8s Time] [2022-12-14 15:22:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 15:22:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2022-12-14 15:22:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 85 states have internal predecessors, (85), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 15:22:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2022-12-14 15:22:07,972 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 82 [2022-12-14 15:22:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:07,972 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2022-12-14 15:22:07,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 22 states have internal predecessors, (61), 13 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-12-14 15:22:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2022-12-14 15:22:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:22:07,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:07,973 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 15:22:07,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 15:22:08,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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)] Forceful destruction successful, exit code 0 [2022-12-14 15:22:08,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 15:22:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:22:08,576 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1512669256, now seen corresponding path program 10 times [2022-12-14 15:22:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:22:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992674376] [2022-12-14 15:22:08,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:22:08,584 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 15:22:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:22:08,585 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:22:08,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:22:10,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:22:10,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 15:22:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-14 15:22:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:10,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:22:10,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992674376] [2022-12-14 15:22:10,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992674376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:10,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594155365] [2022-12-14 15:22:10,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:22:10,970 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:22:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:22:10,971 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:22:10,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 15:22:14,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:22:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 15:22:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-14 15:22:15,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [594155365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263919994] [2022-12-14 15:22:16,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:22:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:22:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:22:16,083 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:22:16,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 15:22:17,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:22:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 6244 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 15:22:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-12-14 15:22:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:19,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263919994] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:19,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:22:19,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14] total 23 [2022-12-14 15:22:19,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333353540] [2022-12-14 15:22:19,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:22:19,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 15:22:19,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:22:19,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 15:22:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-12-14 15:22:19,235 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) [2022-12-14 15:22:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:24,415 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-12-14 15:22:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:22:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) Word has length 94 [2022-12-14 15:22:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:24,416 INFO L225 Difference]: With dead ends: 135 [2022-12-14 15:22:24,416 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 15:22:24,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 15:22:24,417 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:24,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 212 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 15:22:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 15:22:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-12-14 15:22:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 88 states have internal predecessors, (88), 29 states have call successors, (29), 16 states have call predecessors, (29), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 15:22:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2022-12-14 15:22:24,487 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 94 [2022-12-14 15:22:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:24,487 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2022-12-14 15:22:24,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.35) internal successors, (67), 21 states have internal predecessors, (67), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 14 states have call predecessors, (42), 14 states have call successors, (42) [2022-12-14 15:22:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2022-12-14 15:22:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 15:22:24,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:24,489 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-12-14 15:22:24,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:22:24,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 15:22:24,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 15:22:25,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:22:25,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -334938090, now seen corresponding path program 11 times [2022-12-14 15:22:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:22:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24944523] [2022-12-14 15:22:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:22:25,104 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 15:22:25,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:22:25,105 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:22:25,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:22:31,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-14 15:22:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 173 conjunts are in the unsatisfiable core [2022-12-14 15:22:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 152 proven. 323 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-12-14 15:22:35,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:36,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 15:22:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24944523] [2022-12-14 15:22:36,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24944523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:36,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998584572] [2022-12-14 15:22:36,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:22:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 15:22:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 15:22:36,549 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 15:22:36,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 15:22:57,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-14 15:22:57,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:22:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 448 conjunts are in the unsatisfiable core [2022-12-14 15:22:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:23:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 56 proven. 203 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-12-14 15:23:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:23:19,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998584572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:23:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321932096] [2022-12-14 15:23:19,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 15:23:19,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:23:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:23:19,995 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:23:19,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 15:25:17,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-12-14 15:25:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:25:18,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 14160 conjuncts, 220 conjunts are in the unsatisfiable core [2022-12-14 15:25:18,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 117 proven. 298 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2022-12-14 15:25:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321932096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:23,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:25:23,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 18] total 39 [2022-12-14 15:25:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463478211] [2022-12-14 15:25:23,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:25:23,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 15:25:23,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 15:25:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 15:25:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1729, Unknown=2, NotChecked=0, Total=1892 [2022-12-14 15:25:24,000 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 39 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 36 states have internal predecessors, (117), 26 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 22 states have call predecessors, (80), 24 states have call successors, (80) [2022-12-14 15:25:31,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:40,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:43,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:45,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:47,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:49,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:51,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:53,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:55,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:25:57,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:22,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:24,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:26,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:29,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:32,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:35,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:39,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:41,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 15:26:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:42,035 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2022-12-14 15:26:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 15:26:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 36 states have internal predecessors, (117), 26 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 22 states have call predecessors, (80), 24 states have call successors, (80) Word has length 182 [2022-12-14 15:26:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:42,049 INFO L225 Difference]: With dead ends: 200 [2022-12-14 15:26:42,049 INFO L226 Difference]: Without dead ends: 198 [2022-12-14 15:26:42,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 517 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=661, Invalid=5036, Unknown=3, NotChecked=0, Total=5700 [2022-12-14 15:26:42,052 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 191 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:42,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 295 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1793 Invalid, 14 Unknown, 0 Unchecked, 49.5s Time] [2022-12-14 15:26:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-14 15:26:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 173. [2022-12-14 15:26:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.009090909090909) internal successors, (111), 111 states have internal predecessors, (111), 45 states have call successors, (45), 17 states have call predecessors, (45), 17 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2022-12-14 15:26:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 201 transitions. [2022-12-14 15:26:42,176 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 201 transitions. Word has length 182 [2022-12-14 15:26:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:42,177 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 201 transitions. [2022-12-14 15:26:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 36 states have internal predecessors, (117), 26 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (80), 22 states have call predecessors, (80), 24 states have call successors, (80) [2022-12-14 15:26:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 201 transitions. [2022-12-14 15:26:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-12-14 15:26:42,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:42,179 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1] [2022-12-14 15:26:42,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 15:26:42,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:26:42,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 15:26:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 15:26:42,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:26:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1520754410, now seen corresponding path program 12 times [2022-12-14 15:26:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 15:26:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146365434] [2022-12-14 15:26:42,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 15:26:42,829 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 15:26:42,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 15:26:42,830 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:26:42,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3773206-ce00-4dd0-9050-45a3563e097e/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 15:26:47,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-12-14 15:26:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:26:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 12076 conjuncts, 252 conjunts are in the unsatisfiable core [2022-12-14 15:26:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates...