./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 --- 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-5e519f3 [2022-11-03 02:33:13,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:33:13,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:33:13,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:33:13,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:33:13,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:33:13,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:33:13,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:33:13,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:33:13,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:33:13,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:33:13,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:33:13,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:33:13,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:33:13,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:33:13,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:33:13,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:33:13,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:33:13,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:33:13,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:33:13,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:33:13,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:33:13,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:33:14,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:33:14,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:33:14,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:33:14,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:33:14,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:33:14,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:33:14,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:33:14,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:33:14,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:33:14,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:33:14,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:33:14,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:33:14,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:33:14,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:33:14,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:33:14,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:33:14,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:33:14,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:33:14,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:33:14,099 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:33:14,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:33:14,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:33:14,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:33:14,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:33:14,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:33:14,101 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:33:14,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:33:14,102 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:33:14,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:33:14,102 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:33:14,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:33:14,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:33:14,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:33:14,103 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:33:14,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:33:14,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:33:14,104 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:33:14,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:33:14,105 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:33:14,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:33:14,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:33:14,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:33:14,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:33:14,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:33:14,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:33:14,107 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:33:14,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:33:14,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:33:14,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:33:14,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:33:14,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:33:14,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:14,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:33:14,109 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:33:14,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:33:14,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:33:14,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:33:14,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:33:14,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:33:14,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:33:14,111 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_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2205701c87619eed0a8a76ebf684289d4e97e42556aa5e531d0e97f394ad4619 [2022-11-03 02:33:14,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:33:14,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:33:14,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:33:14,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:33:14,530 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:33:14,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2022-11-03 02:33:14,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/data/c8f565f79/4146d75c773c4029b9431647a6db4bad/FLAG3eef8551f [2022-11-03 02:33:15,211 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:33:15,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c [2022-11-03 02:33:15,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/data/c8f565f79/4146d75c773c4029b9431647a6db4bad/FLAG3eef8551f [2022-11-03 02:33:15,535 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/data/c8f565f79/4146d75c773c4029b9431647a6db4bad [2022-11-03 02:33:15,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:33:15,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:33:15,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:15,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:33:15,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:33:15,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49519f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15, skipping insertion in model container [2022-11-03 02:33:15,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:33:15,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:33:15,813 WARN L230 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_a3636283-f089-483b-a771-33ecebbb3d51/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-11-03 02:33:15,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:15,846 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:33:15,862 WARN L230 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_a3636283-f089-483b-a771-33ecebbb3d51/sv-benchmarks/c/nla-digbench-scaling/hard-u_valuebound1.c[537,550] [2022-11-03 02:33:15,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:33:15,888 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:33:15,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15 WrapperNode [2022-11-03 02:33:15,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:33:15,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:15,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:33:15,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:33:15,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,962 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-11-03 02:33:15,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:33:15,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:33:15,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:33:15,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:33:15,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:15,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:16,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:16,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:16,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:33:16,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:33:16,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:33:16,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:33:16,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (1/1) ... [2022-11-03 02:33:16,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:33:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:16,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:33:16,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:33:16,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:33:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:33:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:33:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:33:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:33:16,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:33:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:33:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:33:16,204 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:33:16,207 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:33:16,424 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:33:16,463 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:33:16,464 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:33:16,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:16 BoogieIcfgContainer [2022-11-03 02:33:16,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:33:16,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:33:16,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:33:16,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:33:16,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:33:15" (1/3) ... [2022-11-03 02:33:16,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75245549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:16, skipping insertion in model container [2022-11-03 02:33:16,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:33:15" (2/3) ... [2022-11-03 02:33:16,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75245549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:33:16, skipping insertion in model container [2022-11-03 02:33:16,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:33:16" (3/3) ... [2022-11-03 02:33:16,498 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2022-11-03 02:33:16,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:33:16,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:33:16,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:33:16,664 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;@476a9e7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:33:16,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:33:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 02:33:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:33:16,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:16,681 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:16,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2022-11-03 02:33:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:16,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936600055] [2022-11-03 02:33:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:16,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:33:17,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936600055] [2022-11-03 02:33:17,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936600055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:17,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:17,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:33:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359458282] [2022-11-03 02:33:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:17,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:33:17,435 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:33:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:17,625 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2022-11-03 02:33:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:33:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-03 02:33:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:17,638 INFO L225 Difference]: With dead ends: 58 [2022-11-03 02:33:17,638 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:33:17,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:17,647 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:17,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:33:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-11-03 02:33:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:33:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-11-03 02:33:17,699 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2022-11-03 02:33:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:17,699 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-11-03 02:33:17,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:33:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-11-03 02:33:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:33:17,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:17,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:33:17,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2022-11-03 02:33:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:17,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34520997] [2022-11-03 02:33:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:33:18,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:18,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34520997] [2022-11-03 02:33:18,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34520997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:18,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:18,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:33:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773891053] [2022-11-03 02:33:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:18,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:33:18,377 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:18,520 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-03 02:33:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:33:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-11-03 02:33:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:18,523 INFO L225 Difference]: With dead ends: 41 [2022-11-03 02:33:18,523 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 02:33:18,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:33:18,526 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:18,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 100 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:33:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 02:33:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-03 02:33:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:33:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-03 02:33:18,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-11-03 02:33:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:18,542 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-03 02:33:18,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:33:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-03 02:33:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:33:18,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:18,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:33:18,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2022-11-03 02:33:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203587467] [2022-11-03 02:33:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:18,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:33:18,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493209609] [2022-11-03 02:33:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:18,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:18,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:18,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:33:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:33:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:33:18,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:33:19,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203587467] [2022-11-03 02:33:19,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:33:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493209609] [2022-11-03 02:33:19,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493209609] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:19,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:19,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 02:33:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115398435] [2022-11-03 02:33:19,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:33:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:33:19,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:33:19,126 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:33:21,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:23,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:24,180 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-03 02:33:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-11-03 02:33:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:24,183 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:33:24,183 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:33:24,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:24,185 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:24,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:33:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:33:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-11-03 02:33:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 02:33:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-11-03 02:33:24,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 27 [2022-11-03 02:33:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:24,225 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-11-03 02:33:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:33:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-11-03 02:33:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:33:24,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:24,231 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:24,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:24,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 02:33:24,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1046956766, now seen corresponding path program 1 times [2022-11-03 02:33:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:24,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182752845] [2022-11-03 02:33:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:24,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:24,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:33:24,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929338679] [2022-11-03 02:33:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:24,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:24,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:24,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:24,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:33:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:33:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:33:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:33:26,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182752845] [2022-11-03 02:33:26,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:33:26,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929338679] [2022-11-03 02:33:26,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929338679] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:26,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:26,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 02:33:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435811919] [2022-11-03 02:33:26,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:26,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:33:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:33:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:33:26,025 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:33:29,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:31,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:33,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:33,514 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-11-03 02:33:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2022-11-03 02:33:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:33,520 INFO L225 Difference]: With dead ends: 57 [2022-11-03 02:33:33,523 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 02:33:33,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:33:33,526 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:33,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 3 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 02:33:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 02:33:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-03 02:33:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:33:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-03 02:33:33,557 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2022-11-03 02:33:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:33,560 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-03 02:33:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:33:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-03 02:33:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 02:33:33,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:33,572 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:33,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:33,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2022-11-03 02:33:33,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:33,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513552457] [2022-11-03 02:33:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:33,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:33:33,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812230869] [2022-11-03 02:33:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:33,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:33,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:33:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:33:34,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:33:34,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:33:35,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:35,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513552457] [2022-11-03 02:33:35,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:33:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812230869] [2022-11-03 02:33:35,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812230869] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:35,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:35,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-11-03 02:33:35,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107484919] [2022-11-03 02:33:35,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:35,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:33:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:35,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:33:35,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:33:35,449 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:33:37,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:39,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:40,269 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-03 02:33:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2022-11-03 02:33:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:40,272 INFO L225 Difference]: With dead ends: 61 [2022-11-03 02:33:40,272 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 02:33:40,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:40,274 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:40,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:33:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 02:33:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2022-11-03 02:33:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:33:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-03 02:33:40,307 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 44 [2022-11-03 02:33:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:40,308 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-03 02:33:40,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:33:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-03 02:33:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:33:40,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:40,310 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:40,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:40,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:40,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 15172884, now seen corresponding path program 1 times [2022-11-03 02:33:40,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241636927] [2022-11-03 02:33:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:40,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:33:40,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508672523] [2022-11-03 02:33:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:40,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:40,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:40,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:40,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:33:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:33:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 02:33:41,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:33:42,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241636927] [2022-11-03 02:33:42,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:33:42,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508672523] [2022-11-03 02:33:42,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508672523] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:42,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:33:42,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 02:33:42,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438723282] [2022-11-03 02:33:42,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:33:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:33:42,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:33:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:33:42,193 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:33:45,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:47,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:49,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:51,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:51,821 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-03 02:33:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:33:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-11-03 02:33:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:51,824 INFO L225 Difference]: With dead ends: 61 [2022-11-03 02:33:51,824 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 02:33:51,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:33:51,828 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:51,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 127 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 02:33:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 02:33:51,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-03 02:33:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:33:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-11-03 02:33:51,849 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 45 [2022-11-03 02:33:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:51,850 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-11-03 02:33:51,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 02:33:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-11-03 02:33:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:33:51,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:51,853 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:51,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:33:52,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:52,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2045224127, now seen corresponding path program 1 times [2022-11-03 02:33:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:33:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777583651] [2022-11-03 02:33:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:33:52,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:33:52,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072499492] [2022-11-03 02:33:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:52,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:52,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:52,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3636283-f089-483b-a771-33ecebbb3d51/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process